2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
44 #include <linux/jhash.h>
48 #include "current_stateid.h"
53 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 #define all_ones {{~0,~0},~0}
56 static const stateid_t one_stateid
= {
58 .si_opaque
= all_ones
,
60 static const stateid_t zero_stateid
= {
63 static const stateid_t currentstateid
= {
66 static const stateid_t close_stateid
= {
67 .si_generation
= 0xffffffffU
,
70 static u64 current_sessionid
= 1;
72 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
73 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
74 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
75 #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t)))
77 /* forward declarations */
78 static bool check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
);
79 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
);
84 * Currently used for the del_recall_lru and file hash table. In an
85 * effort to decrease the scope of the client_mutex, this spinlock may
86 * eventually cover more:
88 static DEFINE_SPINLOCK(state_lock
);
90 enum nfsd4_st_mutex_lock_subclass
{
91 OPEN_STATEID_MUTEX
= 0,
92 LOCK_STATEID_MUTEX
= 1,
96 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
97 * the refcount on the open stateid to drop.
99 static DECLARE_WAIT_QUEUE_HEAD(close_wq
);
101 static struct kmem_cache
*client_slab
;
102 static struct kmem_cache
*openowner_slab
;
103 static struct kmem_cache
*lockowner_slab
;
104 static struct kmem_cache
*file_slab
;
105 static struct kmem_cache
*stateid_slab
;
106 static struct kmem_cache
*deleg_slab
;
107 static struct kmem_cache
*odstate_slab
;
109 static void free_session(struct nfsd4_session
*);
111 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops
;
112 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops
;
114 static bool is_session_dead(struct nfsd4_session
*ses
)
116 return ses
->se_flags
& NFS4_SESSION_DEAD
;
119 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
121 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
122 return nfserr_jukebox
;
123 ses
->se_flags
|= NFS4_SESSION_DEAD
;
127 static bool is_client_expired(struct nfs4_client
*clp
)
129 return clp
->cl_time
== 0;
132 static __be32
get_client_locked(struct nfs4_client
*clp
)
134 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
136 lockdep_assert_held(&nn
->client_lock
);
138 if (is_client_expired(clp
))
139 return nfserr_expired
;
140 atomic_inc(&clp
->cl_refcount
);
144 /* must be called under the client_lock */
146 renew_client_locked(struct nfs4_client
*clp
)
148 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
150 if (is_client_expired(clp
)) {
152 printk("%s: client (clientid %08x/%08x) already expired\n",
154 clp
->cl_clientid
.cl_boot
,
155 clp
->cl_clientid
.cl_id
);
159 dprintk("renewing client (clientid %08x/%08x)\n",
160 clp
->cl_clientid
.cl_boot
,
161 clp
->cl_clientid
.cl_id
);
162 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
163 clp
->cl_time
= get_seconds();
166 static void put_client_renew_locked(struct nfs4_client
*clp
)
168 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
170 lockdep_assert_held(&nn
->client_lock
);
172 if (!atomic_dec_and_test(&clp
->cl_refcount
))
174 if (!is_client_expired(clp
))
175 renew_client_locked(clp
);
178 static void put_client_renew(struct nfs4_client
*clp
)
180 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
182 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
184 if (!is_client_expired(clp
))
185 renew_client_locked(clp
);
186 spin_unlock(&nn
->client_lock
);
189 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
193 if (is_session_dead(ses
))
194 return nfserr_badsession
;
195 status
= get_client_locked(ses
->se_client
);
198 atomic_inc(&ses
->se_ref
);
202 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
204 struct nfs4_client
*clp
= ses
->se_client
;
205 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
207 lockdep_assert_held(&nn
->client_lock
);
209 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
211 put_client_renew_locked(clp
);
214 static void nfsd4_put_session(struct nfsd4_session
*ses
)
216 struct nfs4_client
*clp
= ses
->se_client
;
217 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
219 spin_lock(&nn
->client_lock
);
220 nfsd4_put_session_locked(ses
);
221 spin_unlock(&nn
->client_lock
);
224 static struct nfsd4_blocked_lock
*
225 find_blocked_lock(struct nfs4_lockowner
*lo
, struct knfsd_fh
*fh
,
228 struct nfsd4_blocked_lock
*cur
, *found
= NULL
;
230 spin_lock(&nn
->blocked_locks_lock
);
231 list_for_each_entry(cur
, &lo
->lo_blocked
, nbl_list
) {
232 if (fh_match(fh
, &cur
->nbl_fh
)) {
233 list_del_init(&cur
->nbl_list
);
234 list_del_init(&cur
->nbl_lru
);
239 spin_unlock(&nn
->blocked_locks_lock
);
241 posix_unblock_lock(&found
->nbl_lock
);
245 static struct nfsd4_blocked_lock
*
246 find_or_allocate_block(struct nfs4_lockowner
*lo
, struct knfsd_fh
*fh
,
249 struct nfsd4_blocked_lock
*nbl
;
251 nbl
= find_blocked_lock(lo
, fh
, nn
);
253 nbl
= kmalloc(sizeof(*nbl
), GFP_KERNEL
);
255 fh_copy_shallow(&nbl
->nbl_fh
, fh
);
256 locks_init_lock(&nbl
->nbl_lock
);
257 nfsd4_init_cb(&nbl
->nbl_cb
, lo
->lo_owner
.so_client
,
258 &nfsd4_cb_notify_lock_ops
,
259 NFSPROC4_CLNT_CB_NOTIFY_LOCK
);
266 free_blocked_lock(struct nfsd4_blocked_lock
*nbl
)
268 locks_release_private(&nbl
->nbl_lock
);
273 remove_blocked_locks(struct nfs4_lockowner
*lo
)
275 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
276 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
277 struct nfsd4_blocked_lock
*nbl
;
280 /* Dequeue all blocked locks */
281 spin_lock(&nn
->blocked_locks_lock
);
282 while (!list_empty(&lo
->lo_blocked
)) {
283 nbl
= list_first_entry(&lo
->lo_blocked
,
284 struct nfsd4_blocked_lock
,
286 list_del_init(&nbl
->nbl_list
);
287 list_move(&nbl
->nbl_lru
, &reaplist
);
289 spin_unlock(&nn
->blocked_locks_lock
);
292 while (!list_empty(&reaplist
)) {
293 nbl
= list_first_entry(&reaplist
, struct nfsd4_blocked_lock
,
295 list_del_init(&nbl
->nbl_lru
);
296 posix_unblock_lock(&nbl
->nbl_lock
);
297 free_blocked_lock(nbl
);
302 nfsd4_cb_notify_lock_done(struct nfsd4_callback
*cb
, struct rpc_task
*task
)
305 * Since this is just an optimization, we don't try very hard if it
306 * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and
307 * just quit trying on anything else.
309 switch (task
->tk_status
) {
311 rpc_delay(task
, 1 * HZ
);
319 nfsd4_cb_notify_lock_release(struct nfsd4_callback
*cb
)
321 struct nfsd4_blocked_lock
*nbl
= container_of(cb
,
322 struct nfsd4_blocked_lock
, nbl_cb
);
324 free_blocked_lock(nbl
);
327 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops
= {
328 .done
= nfsd4_cb_notify_lock_done
,
329 .release
= nfsd4_cb_notify_lock_release
,
332 static inline struct nfs4_stateowner
*
333 nfs4_get_stateowner(struct nfs4_stateowner
*sop
)
335 atomic_inc(&sop
->so_count
);
340 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
)
342 return (sop
->so_owner
.len
== owner
->len
) &&
343 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
);
346 static struct nfs4_openowner
*
347 find_openstateowner_str_locked(unsigned int hashval
, struct nfsd4_open
*open
,
348 struct nfs4_client
*clp
)
350 struct nfs4_stateowner
*so
;
352 lockdep_assert_held(&clp
->cl_lock
);
354 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[hashval
],
356 if (!so
->so_is_open_owner
)
358 if (same_owner_str(so
, &open
->op_owner
))
359 return openowner(nfs4_get_stateowner(so
));
364 static struct nfs4_openowner
*
365 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
366 struct nfs4_client
*clp
)
368 struct nfs4_openowner
*oo
;
370 spin_lock(&clp
->cl_lock
);
371 oo
= find_openstateowner_str_locked(hashval
, open
, clp
);
372 spin_unlock(&clp
->cl_lock
);
377 opaque_hashval(const void *ptr
, int nbytes
)
379 unsigned char *cptr
= (unsigned char *) ptr
;
389 static void nfsd4_free_file_rcu(struct rcu_head
*rcu
)
391 struct nfs4_file
*fp
= container_of(rcu
, struct nfs4_file
, fi_rcu
);
393 kmem_cache_free(file_slab
, fp
);
397 put_nfs4_file(struct nfs4_file
*fi
)
399 might_lock(&state_lock
);
401 if (refcount_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
402 hlist_del_rcu(&fi
->fi_hash
);
403 spin_unlock(&state_lock
);
404 WARN_ON_ONCE(!list_empty(&fi
->fi_clnt_odstate
));
405 WARN_ON_ONCE(!list_empty(&fi
->fi_delegations
));
406 call_rcu(&fi
->fi_rcu
, nfsd4_free_file_rcu
);
411 __nfs4_get_fd(struct nfs4_file
*f
, int oflag
)
413 if (f
->fi_fds
[oflag
])
414 return get_file(f
->fi_fds
[oflag
]);
419 find_writeable_file_locked(struct nfs4_file
*f
)
423 lockdep_assert_held(&f
->fi_lock
);
425 ret
= __nfs4_get_fd(f
, O_WRONLY
);
427 ret
= __nfs4_get_fd(f
, O_RDWR
);
432 find_writeable_file(struct nfs4_file
*f
)
436 spin_lock(&f
->fi_lock
);
437 ret
= find_writeable_file_locked(f
);
438 spin_unlock(&f
->fi_lock
);
443 static struct file
*find_readable_file_locked(struct nfs4_file
*f
)
447 lockdep_assert_held(&f
->fi_lock
);
449 ret
= __nfs4_get_fd(f
, O_RDONLY
);
451 ret
= __nfs4_get_fd(f
, O_RDWR
);
456 find_readable_file(struct nfs4_file
*f
)
460 spin_lock(&f
->fi_lock
);
461 ret
= find_readable_file_locked(f
);
462 spin_unlock(&f
->fi_lock
);
468 find_any_file(struct nfs4_file
*f
)
472 spin_lock(&f
->fi_lock
);
473 ret
= __nfs4_get_fd(f
, O_RDWR
);
475 ret
= __nfs4_get_fd(f
, O_WRONLY
);
477 ret
= __nfs4_get_fd(f
, O_RDONLY
);
479 spin_unlock(&f
->fi_lock
);
483 static atomic_long_t num_delegations
;
484 unsigned long max_delegations
;
487 * Open owner state (share locks)
490 /* hash tables for lock and open owners */
491 #define OWNER_HASH_BITS 8
492 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
493 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
495 static unsigned int ownerstr_hashval(struct xdr_netobj
*ownername
)
499 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
500 return ret
& OWNER_HASH_MASK
;
503 /* hash table for nfs4_file */
504 #define FILE_HASH_BITS 8
505 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
507 static unsigned int nfsd_fh_hashval(struct knfsd_fh
*fh
)
509 return jhash2(fh
->fh_base
.fh_pad
, XDR_QUADLEN(fh
->fh_size
), 0);
512 static unsigned int file_hashval(struct knfsd_fh
*fh
)
514 return nfsd_fh_hashval(fh
) & (FILE_HASH_SIZE
- 1);
517 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
520 __nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
522 lockdep_assert_held(&fp
->fi_lock
);
524 if (access
& NFS4_SHARE_ACCESS_WRITE
)
525 atomic_inc(&fp
->fi_access
[O_WRONLY
]);
526 if (access
& NFS4_SHARE_ACCESS_READ
)
527 atomic_inc(&fp
->fi_access
[O_RDONLY
]);
531 nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
533 lockdep_assert_held(&fp
->fi_lock
);
535 /* Does this access mode make sense? */
536 if (access
& ~NFS4_SHARE_ACCESS_BOTH
)
539 /* Does it conflict with a deny mode already set? */
540 if ((access
& fp
->fi_share_deny
) != 0)
541 return nfserr_share_denied
;
543 __nfs4_file_get_access(fp
, access
);
547 static __be32
nfs4_file_check_deny(struct nfs4_file
*fp
, u32 deny
)
549 /* Common case is that there is no deny mode. */
551 /* Does this deny mode make sense? */
552 if (deny
& ~NFS4_SHARE_DENY_BOTH
)
555 if ((deny
& NFS4_SHARE_DENY_READ
) &&
556 atomic_read(&fp
->fi_access
[O_RDONLY
]))
557 return nfserr_share_denied
;
559 if ((deny
& NFS4_SHARE_DENY_WRITE
) &&
560 atomic_read(&fp
->fi_access
[O_WRONLY
]))
561 return nfserr_share_denied
;
566 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
568 might_lock(&fp
->fi_lock
);
570 if (atomic_dec_and_lock(&fp
->fi_access
[oflag
], &fp
->fi_lock
)) {
571 struct file
*f1
= NULL
;
572 struct file
*f2
= NULL
;
574 swap(f1
, fp
->fi_fds
[oflag
]);
575 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
576 swap(f2
, fp
->fi_fds
[O_RDWR
]);
577 spin_unlock(&fp
->fi_lock
);
585 static void nfs4_file_put_access(struct nfs4_file
*fp
, u32 access
)
587 WARN_ON_ONCE(access
& ~NFS4_SHARE_ACCESS_BOTH
);
589 if (access
& NFS4_SHARE_ACCESS_WRITE
)
590 __nfs4_file_put_access(fp
, O_WRONLY
);
591 if (access
& NFS4_SHARE_ACCESS_READ
)
592 __nfs4_file_put_access(fp
, O_RDONLY
);
596 * Allocate a new open/delegation state counter. This is needed for
597 * pNFS for proper return on close semantics.
599 * Note that we only allocate it for pNFS-enabled exports, otherwise
600 * all pointers to struct nfs4_clnt_odstate are always NULL.
602 static struct nfs4_clnt_odstate
*
603 alloc_clnt_odstate(struct nfs4_client
*clp
)
605 struct nfs4_clnt_odstate
*co
;
607 co
= kmem_cache_zalloc(odstate_slab
, GFP_KERNEL
);
610 refcount_set(&co
->co_odcount
, 1);
616 hash_clnt_odstate_locked(struct nfs4_clnt_odstate
*co
)
618 struct nfs4_file
*fp
= co
->co_file
;
620 lockdep_assert_held(&fp
->fi_lock
);
621 list_add(&co
->co_perfile
, &fp
->fi_clnt_odstate
);
625 get_clnt_odstate(struct nfs4_clnt_odstate
*co
)
628 refcount_inc(&co
->co_odcount
);
632 put_clnt_odstate(struct nfs4_clnt_odstate
*co
)
634 struct nfs4_file
*fp
;
640 if (refcount_dec_and_lock(&co
->co_odcount
, &fp
->fi_lock
)) {
641 list_del(&co
->co_perfile
);
642 spin_unlock(&fp
->fi_lock
);
644 nfsd4_return_all_file_layouts(co
->co_client
, fp
);
645 kmem_cache_free(odstate_slab
, co
);
649 static struct nfs4_clnt_odstate
*
650 find_or_hash_clnt_odstate(struct nfs4_file
*fp
, struct nfs4_clnt_odstate
*new)
652 struct nfs4_clnt_odstate
*co
;
653 struct nfs4_client
*cl
;
660 spin_lock(&fp
->fi_lock
);
661 list_for_each_entry(co
, &fp
->fi_clnt_odstate
, co_perfile
) {
662 if (co
->co_client
== cl
) {
663 get_clnt_odstate(co
);
669 hash_clnt_odstate_locked(new);
671 spin_unlock(&fp
->fi_lock
);
675 struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
,
676 void (*sc_free
)(struct nfs4_stid
*))
678 struct nfs4_stid
*stid
;
681 stid
= kmem_cache_zalloc(slab
, GFP_KERNEL
);
685 idr_preload(GFP_KERNEL
);
686 spin_lock(&cl
->cl_lock
);
687 new_id
= idr_alloc_cyclic(&cl
->cl_stateids
, stid
, 0, 0, GFP_NOWAIT
);
688 spin_unlock(&cl
->cl_lock
);
693 stid
->sc_free
= sc_free
;
694 stid
->sc_client
= cl
;
695 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
696 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
697 /* Will be incremented before return to client: */
698 refcount_set(&stid
->sc_count
, 1);
699 spin_lock_init(&stid
->sc_lock
);
702 * It shouldn't be a problem to reuse an opaque stateid value.
703 * I don't think it is for 4.1. But with 4.0 I worry that, for
704 * example, a stray write retransmission could be accepted by
705 * the server when it should have been rejected. Therefore,
706 * adopt a trick from the sctp code to attempt to maximize the
707 * amount of time until an id is reused, by ensuring they always
708 * "increase" (mod INT_MAX):
712 kmem_cache_free(slab
, stid
);
716 static struct nfs4_ol_stateid
* nfs4_alloc_open_stateid(struct nfs4_client
*clp
)
718 struct nfs4_stid
*stid
;
720 stid
= nfs4_alloc_stid(clp
, stateid_slab
, nfs4_free_ol_stateid
);
724 return openlockstateid(stid
);
727 static void nfs4_free_deleg(struct nfs4_stid
*stid
)
729 kmem_cache_free(deleg_slab
, stid
);
730 atomic_long_dec(&num_delegations
);
734 * When we recall a delegation, we should be careful not to hand it
735 * out again straight away.
736 * To ensure this we keep a pair of bloom filters ('new' and 'old')
737 * in which the filehandles of recalled delegations are "stored".
738 * If a filehandle appear in either filter, a delegation is blocked.
739 * When a delegation is recalled, the filehandle is stored in the "new"
741 * Every 30 seconds we swap the filters and clear the "new" one,
742 * unless both are empty of course.
744 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
745 * low 3 bytes as hash-table indices.
747 * 'blocked_delegations_lock', which is always taken in block_delegations(),
748 * is used to manage concurrent access. Testing does not need the lock
749 * except when swapping the two filters.
751 static DEFINE_SPINLOCK(blocked_delegations_lock
);
752 static struct bloom_pair
{
753 int entries
, old_entries
;
755 int new; /* index into 'set' */
756 DECLARE_BITMAP(set
[2], 256);
757 } blocked_delegations
;
759 static int delegation_blocked(struct knfsd_fh
*fh
)
762 struct bloom_pair
*bd
= &blocked_delegations
;
764 if (bd
->entries
== 0)
766 if (seconds_since_boot() - bd
->swap_time
> 30) {
767 spin_lock(&blocked_delegations_lock
);
768 if (seconds_since_boot() - bd
->swap_time
> 30) {
769 bd
->entries
-= bd
->old_entries
;
770 bd
->old_entries
= bd
->entries
;
771 memset(bd
->set
[bd
->new], 0,
774 bd
->swap_time
= seconds_since_boot();
776 spin_unlock(&blocked_delegations_lock
);
778 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
779 if (test_bit(hash
&255, bd
->set
[0]) &&
780 test_bit((hash
>>8)&255, bd
->set
[0]) &&
781 test_bit((hash
>>16)&255, bd
->set
[0]))
784 if (test_bit(hash
&255, bd
->set
[1]) &&
785 test_bit((hash
>>8)&255, bd
->set
[1]) &&
786 test_bit((hash
>>16)&255, bd
->set
[1]))
792 static void block_delegations(struct knfsd_fh
*fh
)
795 struct bloom_pair
*bd
= &blocked_delegations
;
797 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
799 spin_lock(&blocked_delegations_lock
);
800 __set_bit(hash
&255, bd
->set
[bd
->new]);
801 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
802 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
803 if (bd
->entries
== 0)
804 bd
->swap_time
= seconds_since_boot();
806 spin_unlock(&blocked_delegations_lock
);
809 static struct nfs4_delegation
*
810 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_file
*fp
,
811 struct svc_fh
*current_fh
,
812 struct nfs4_clnt_odstate
*odstate
)
814 struct nfs4_delegation
*dp
;
817 dprintk("NFSD alloc_init_deleg\n");
818 n
= atomic_long_inc_return(&num_delegations
);
819 if (n
< 0 || n
> max_delegations
)
821 if (delegation_blocked(¤t_fh
->fh_handle
))
823 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
, nfs4_free_deleg
));
828 * delegation seqid's are never incremented. The 4.1 special
829 * meaning of seqid 0 isn't meaningful, really, but let's avoid
830 * 0 anyway just for consistency and use 1:
832 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
833 INIT_LIST_HEAD(&dp
->dl_perfile
);
834 INIT_LIST_HEAD(&dp
->dl_perclnt
);
835 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
836 dp
->dl_clnt_odstate
= odstate
;
837 get_clnt_odstate(odstate
);
838 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
840 nfsd4_init_cb(&dp
->dl_recall
, dp
->dl_stid
.sc_client
,
841 &nfsd4_cb_recall_ops
, NFSPROC4_CLNT_CB_RECALL
);
843 dp
->dl_stid
.sc_file
= fp
;
846 atomic_long_dec(&num_delegations
);
851 nfs4_put_stid(struct nfs4_stid
*s
)
853 struct nfs4_file
*fp
= s
->sc_file
;
854 struct nfs4_client
*clp
= s
->sc_client
;
856 might_lock(&clp
->cl_lock
);
858 if (!refcount_dec_and_lock(&s
->sc_count
, &clp
->cl_lock
)) {
859 wake_up_all(&close_wq
);
862 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
863 spin_unlock(&clp
->cl_lock
);
870 nfs4_inc_and_copy_stateid(stateid_t
*dst
, struct nfs4_stid
*stid
)
872 stateid_t
*src
= &stid
->sc_stateid
;
874 spin_lock(&stid
->sc_lock
);
875 if (unlikely(++src
->si_generation
== 0))
876 src
->si_generation
= 1;
877 memcpy(dst
, src
, sizeof(*dst
));
878 spin_unlock(&stid
->sc_lock
);
881 static void put_deleg_file(struct nfs4_file
*fp
)
883 struct file
*filp
= NULL
;
885 spin_lock(&fp
->fi_lock
);
886 if (--fp
->fi_delegees
== 0)
887 swap(filp
, fp
->fi_deleg_file
);
888 spin_unlock(&fp
->fi_lock
);
894 static void nfs4_unlock_deleg_lease(struct nfs4_delegation
*dp
)
896 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
897 struct file
*filp
= fp
->fi_deleg_file
;
899 WARN_ON_ONCE(!fp
->fi_delegees
);
901 vfs_setlease(filp
, F_UNLCK
, NULL
, (void **)&dp
);
905 static void destroy_unhashed_deleg(struct nfs4_delegation
*dp
)
907 put_clnt_odstate(dp
->dl_clnt_odstate
);
908 nfs4_unlock_deleg_lease(dp
);
909 nfs4_put_stid(&dp
->dl_stid
);
912 void nfs4_unhash_stid(struct nfs4_stid
*s
)
918 * nfs4_delegation_exists - Discover if this delegation already exists
919 * @clp: a pointer to the nfs4_client we're granting a delegation to
920 * @fp: a pointer to the nfs4_file we're granting a delegation on
923 * On success: true iff an existing delegation is found
927 nfs4_delegation_exists(struct nfs4_client
*clp
, struct nfs4_file
*fp
)
929 struct nfs4_delegation
*searchdp
= NULL
;
930 struct nfs4_client
*searchclp
= NULL
;
932 lockdep_assert_held(&state_lock
);
933 lockdep_assert_held(&fp
->fi_lock
);
935 list_for_each_entry(searchdp
, &fp
->fi_delegations
, dl_perfile
) {
936 searchclp
= searchdp
->dl_stid
.sc_client
;
937 if (clp
== searchclp
) {
945 * hash_delegation_locked - Add a delegation to the appropriate lists
946 * @dp: a pointer to the nfs4_delegation we are adding.
947 * @fp: a pointer to the nfs4_file we're granting a delegation on
950 * On success: NULL if the delegation was successfully hashed.
952 * On error: -EAGAIN if one was previously granted to this
953 * nfs4_client for this nfs4_file. Delegation is not hashed.
958 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
960 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
962 lockdep_assert_held(&state_lock
);
963 lockdep_assert_held(&fp
->fi_lock
);
965 if (nfs4_delegation_exists(clp
, fp
))
967 refcount_inc(&dp
->dl_stid
.sc_count
);
968 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
969 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
970 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
975 unhash_delegation_locked(struct nfs4_delegation
*dp
)
977 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
979 lockdep_assert_held(&state_lock
);
981 if (list_empty(&dp
->dl_perfile
))
984 dp
->dl_stid
.sc_type
= NFS4_CLOSED_DELEG_STID
;
985 /* Ensure that deleg break won't try to requeue it */
987 spin_lock(&fp
->fi_lock
);
988 list_del_init(&dp
->dl_perclnt
);
989 list_del_init(&dp
->dl_recall_lru
);
990 list_del_init(&dp
->dl_perfile
);
991 spin_unlock(&fp
->fi_lock
);
995 static void destroy_delegation(struct nfs4_delegation
*dp
)
999 spin_lock(&state_lock
);
1000 unhashed
= unhash_delegation_locked(dp
);
1001 spin_unlock(&state_lock
);
1003 destroy_unhashed_deleg(dp
);
1006 static void revoke_delegation(struct nfs4_delegation
*dp
)
1008 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
1010 WARN_ON(!list_empty(&dp
->dl_recall_lru
));
1012 if (clp
->cl_minorversion
) {
1013 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
1014 refcount_inc(&dp
->dl_stid
.sc_count
);
1015 spin_lock(&clp
->cl_lock
);
1016 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
1017 spin_unlock(&clp
->cl_lock
);
1019 destroy_unhashed_deleg(dp
);
1026 static unsigned int clientid_hashval(u32 id
)
1028 return id
& CLIENT_HASH_MASK
;
1031 static unsigned int clientstr_hashval(const char *name
)
1033 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
1037 * We store the NONE, READ, WRITE, and BOTH bits separately in the
1038 * st_{access,deny}_bmap field of the stateid, in order to track not
1039 * only what share bits are currently in force, but also what
1040 * combinations of share bits previous opens have used. This allows us
1041 * to enforce the recommendation of rfc 3530 14.2.19 that the server
1042 * return an error if the client attempt to downgrade to a combination
1043 * of share bits not explicable by closing some of its previous opens.
1045 * XXX: This enforcement is actually incomplete, since we don't keep
1046 * track of access/deny bit combinations; so, e.g., we allow:
1048 * OPEN allow read, deny write
1049 * OPEN allow both, deny none
1050 * DOWNGRADE allow read, deny none
1052 * which we should reject.
1055 bmap_to_share_mode(unsigned long bmap
) {
1057 unsigned int access
= 0;
1059 for (i
= 1; i
< 4; i
++) {
1060 if (test_bit(i
, &bmap
))
1066 /* set share access for a given stateid */
1068 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
1070 unsigned char mask
= 1 << access
;
1072 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
1073 stp
->st_access_bmap
|= mask
;
1076 /* clear share access for a given stateid */
1078 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
1080 unsigned char mask
= 1 << access
;
1082 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
1083 stp
->st_access_bmap
&= ~mask
;
1086 /* test whether a given stateid has access */
1088 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
1090 unsigned char mask
= 1 << access
;
1092 return (bool)(stp
->st_access_bmap
& mask
);
1095 /* set share deny for a given stateid */
1097 set_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1099 unsigned char mask
= 1 << deny
;
1101 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
1102 stp
->st_deny_bmap
|= mask
;
1105 /* clear share deny for a given stateid */
1107 clear_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1109 unsigned char mask
= 1 << deny
;
1111 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
1112 stp
->st_deny_bmap
&= ~mask
;
1115 /* test whether a given stateid is denying specific access */
1117 test_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1119 unsigned char mask
= 1 << deny
;
1121 return (bool)(stp
->st_deny_bmap
& mask
);
1124 static int nfs4_access_to_omode(u32 access
)
1126 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
1127 case NFS4_SHARE_ACCESS_READ
:
1129 case NFS4_SHARE_ACCESS_WRITE
:
1131 case NFS4_SHARE_ACCESS_BOTH
:
1139 * A stateid that had a deny mode associated with it is being released
1140 * or downgraded. Recalculate the deny mode on the file.
1143 recalculate_deny_mode(struct nfs4_file
*fp
)
1145 struct nfs4_ol_stateid
*stp
;
1147 spin_lock(&fp
->fi_lock
);
1148 fp
->fi_share_deny
= 0;
1149 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
)
1150 fp
->fi_share_deny
|= bmap_to_share_mode(stp
->st_deny_bmap
);
1151 spin_unlock(&fp
->fi_lock
);
1155 reset_union_bmap_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1158 bool change
= false;
1160 for (i
= 1; i
< 4; i
++) {
1161 if ((i
& deny
) != i
) {
1167 /* Recalculate per-file deny mode if there was a change */
1169 recalculate_deny_mode(stp
->st_stid
.sc_file
);
1172 /* release all access and file references for a given stateid */
1174 release_all_access(struct nfs4_ol_stateid
*stp
)
1177 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
1179 if (fp
&& stp
->st_deny_bmap
!= 0)
1180 recalculate_deny_mode(fp
);
1182 for (i
= 1; i
< 4; i
++) {
1183 if (test_access(i
, stp
))
1184 nfs4_file_put_access(stp
->st_stid
.sc_file
, i
);
1185 clear_access(i
, stp
);
1189 static inline void nfs4_free_stateowner(struct nfs4_stateowner
*sop
)
1191 kfree(sop
->so_owner
.data
);
1192 sop
->so_ops
->so_free(sop
);
1195 static void nfs4_put_stateowner(struct nfs4_stateowner
*sop
)
1197 struct nfs4_client
*clp
= sop
->so_client
;
1199 might_lock(&clp
->cl_lock
);
1201 if (!atomic_dec_and_lock(&sop
->so_count
, &clp
->cl_lock
))
1203 sop
->so_ops
->so_unhash(sop
);
1204 spin_unlock(&clp
->cl_lock
);
1205 nfs4_free_stateowner(sop
);
1208 static bool unhash_ol_stateid(struct nfs4_ol_stateid
*stp
)
1210 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
1212 lockdep_assert_held(&stp
->st_stateowner
->so_client
->cl_lock
);
1214 if (list_empty(&stp
->st_perfile
))
1217 spin_lock(&fp
->fi_lock
);
1218 list_del_init(&stp
->st_perfile
);
1219 spin_unlock(&fp
->fi_lock
);
1220 list_del(&stp
->st_perstateowner
);
1224 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
)
1226 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
1228 put_clnt_odstate(stp
->st_clnt_odstate
);
1229 release_all_access(stp
);
1230 if (stp
->st_stateowner
)
1231 nfs4_put_stateowner(stp
->st_stateowner
);
1232 kmem_cache_free(stateid_slab
, stid
);
1235 static void nfs4_free_lock_stateid(struct nfs4_stid
*stid
)
1237 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
1238 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
1241 file
= find_any_file(stp
->st_stid
.sc_file
);
1243 filp_close(file
, (fl_owner_t
)lo
);
1244 nfs4_free_ol_stateid(stid
);
1248 * Put the persistent reference to an already unhashed generic stateid, while
1249 * holding the cl_lock. If it's the last reference, then put it onto the
1250 * reaplist for later destruction.
1252 static void put_ol_stateid_locked(struct nfs4_ol_stateid
*stp
,
1253 struct list_head
*reaplist
)
1255 struct nfs4_stid
*s
= &stp
->st_stid
;
1256 struct nfs4_client
*clp
= s
->sc_client
;
1258 lockdep_assert_held(&clp
->cl_lock
);
1260 WARN_ON_ONCE(!list_empty(&stp
->st_locks
));
1262 if (!refcount_dec_and_test(&s
->sc_count
)) {
1263 wake_up_all(&close_wq
);
1267 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
1268 list_add(&stp
->st_locks
, reaplist
);
1271 static bool unhash_lock_stateid(struct nfs4_ol_stateid
*stp
)
1273 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1275 list_del_init(&stp
->st_locks
);
1276 nfs4_unhash_stid(&stp
->st_stid
);
1277 return unhash_ol_stateid(stp
);
1280 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
1282 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
1285 spin_lock(&clp
->cl_lock
);
1286 unhashed
= unhash_lock_stateid(stp
);
1287 spin_unlock(&clp
->cl_lock
);
1289 nfs4_put_stid(&stp
->st_stid
);
1292 static void unhash_lockowner_locked(struct nfs4_lockowner
*lo
)
1294 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1296 lockdep_assert_held(&clp
->cl_lock
);
1298 list_del_init(&lo
->lo_owner
.so_strhash
);
1302 * Free a list of generic stateids that were collected earlier after being
1306 free_ol_stateid_reaplist(struct list_head
*reaplist
)
1308 struct nfs4_ol_stateid
*stp
;
1309 struct nfs4_file
*fp
;
1313 while (!list_empty(reaplist
)) {
1314 stp
= list_first_entry(reaplist
, struct nfs4_ol_stateid
,
1316 list_del(&stp
->st_locks
);
1317 fp
= stp
->st_stid
.sc_file
;
1318 stp
->st_stid
.sc_free(&stp
->st_stid
);
1324 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
,
1325 struct list_head
*reaplist
)
1327 struct nfs4_ol_stateid
*stp
;
1329 lockdep_assert_held(&open_stp
->st_stid
.sc_client
->cl_lock
);
1331 while (!list_empty(&open_stp
->st_locks
)) {
1332 stp
= list_entry(open_stp
->st_locks
.next
,
1333 struct nfs4_ol_stateid
, st_locks
);
1334 WARN_ON(!unhash_lock_stateid(stp
));
1335 put_ol_stateid_locked(stp
, reaplist
);
1339 static bool unhash_open_stateid(struct nfs4_ol_stateid
*stp
,
1340 struct list_head
*reaplist
)
1344 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1346 unhashed
= unhash_ol_stateid(stp
);
1347 release_open_stateid_locks(stp
, reaplist
);
1351 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
1353 LIST_HEAD(reaplist
);
1355 spin_lock(&stp
->st_stid
.sc_client
->cl_lock
);
1356 if (unhash_open_stateid(stp
, &reaplist
))
1357 put_ol_stateid_locked(stp
, &reaplist
);
1358 spin_unlock(&stp
->st_stid
.sc_client
->cl_lock
);
1359 free_ol_stateid_reaplist(&reaplist
);
1362 static void unhash_openowner_locked(struct nfs4_openowner
*oo
)
1364 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1366 lockdep_assert_held(&clp
->cl_lock
);
1368 list_del_init(&oo
->oo_owner
.so_strhash
);
1369 list_del_init(&oo
->oo_perclient
);
1372 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
1374 struct nfsd_net
*nn
= net_generic(oo
->oo_owner
.so_client
->net
,
1376 struct nfs4_ol_stateid
*s
;
1378 spin_lock(&nn
->client_lock
);
1379 s
= oo
->oo_last_closed_stid
;
1381 list_del_init(&oo
->oo_close_lru
);
1382 oo
->oo_last_closed_stid
= NULL
;
1384 spin_unlock(&nn
->client_lock
);
1386 nfs4_put_stid(&s
->st_stid
);
1389 static void release_openowner(struct nfs4_openowner
*oo
)
1391 struct nfs4_ol_stateid
*stp
;
1392 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1393 struct list_head reaplist
;
1395 INIT_LIST_HEAD(&reaplist
);
1397 spin_lock(&clp
->cl_lock
);
1398 unhash_openowner_locked(oo
);
1399 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
1400 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
1401 struct nfs4_ol_stateid
, st_perstateowner
);
1402 if (unhash_open_stateid(stp
, &reaplist
))
1403 put_ol_stateid_locked(stp
, &reaplist
);
1405 spin_unlock(&clp
->cl_lock
);
1406 free_ol_stateid_reaplist(&reaplist
);
1407 release_last_closed_stateid(oo
);
1408 nfs4_put_stateowner(&oo
->oo_owner
);
1412 hash_sessionid(struct nfs4_sessionid
*sessionid
)
1414 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
1416 return sid
->sequence
% SESSION_HASH_SIZE
;
1419 #ifdef CONFIG_SUNRPC_DEBUG
1421 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1423 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
1424 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
1428 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1434 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1435 * won't be used for replay.
1437 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
1439 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
1441 if (nfserr
== nfserr_replay_me
)
1444 if (!seqid_mutating_err(ntohl(nfserr
))) {
1445 nfsd4_cstate_clear_replay(cstate
);
1450 if (so
->so_is_open_owner
)
1451 release_last_closed_stateid(openowner(so
));
1457 gen_sessionid(struct nfsd4_session
*ses
)
1459 struct nfs4_client
*clp
= ses
->se_client
;
1460 struct nfsd4_sessionid
*sid
;
1462 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
1463 sid
->clientid
= clp
->cl_clientid
;
1464 sid
->sequence
= current_sessionid
++;
1469 * The protocol defines ca_maxresponssize_cached to include the size of
1470 * the rpc header, but all we need to cache is the data starting after
1471 * the end of the initial SEQUENCE operation--the rest we regenerate
1472 * each time. Therefore we can advertise a ca_maxresponssize_cached
1473 * value that is the number of bytes in our cache plus a few additional
1474 * bytes. In order to stay on the safe side, and not promise more than
1475 * we can cache, those additional bytes must be the minimum possible: 24
1476 * bytes of rpc header (xid through accept state, with AUTH_NULL
1477 * verifier), 12 for the compound header (with zero-length tag), and 44
1478 * for the SEQUENCE op response:
1480 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1483 free_session_slots(struct nfsd4_session
*ses
)
1487 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++) {
1488 free_svc_cred(&ses
->se_slots
[i
]->sl_cred
);
1489 kfree(ses
->se_slots
[i
]);
1494 * We don't actually need to cache the rpc and session headers, so we
1495 * can allocate a little less for each slot:
1497 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
1501 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
1504 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
1505 return size
+ sizeof(struct nfsd4_slot
);
1509 * XXX: If we run out of reserved DRC memory we could (up to a point)
1510 * re-negotiate active sessions and reduce their slot usage to make
1511 * room for new connections. For now we just fail the create session.
1513 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
1515 u32 slotsize
= slot_bytes(ca
);
1516 u32 num
= ca
->maxreqs
;
1519 spin_lock(&nfsd_drc_lock
);
1520 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
1521 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
1523 * Never use more than a third of the remaining memory,
1524 * unless it's the only way to give this client a slot:
1526 avail
= clamp_t(int, avail
, slotsize
, avail
/3);
1527 num
= min_t(int, num
, avail
/ slotsize
);
1528 nfsd_drc_mem_used
+= num
* slotsize
;
1529 spin_unlock(&nfsd_drc_lock
);
1534 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
1536 int slotsize
= slot_bytes(ca
);
1538 spin_lock(&nfsd_drc_lock
);
1539 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
1540 spin_unlock(&nfsd_drc_lock
);
1543 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
1544 struct nfsd4_channel_attrs
*battrs
)
1546 int numslots
= fattrs
->maxreqs
;
1547 int slotsize
= slot_bytes(fattrs
);
1548 struct nfsd4_session
*new;
1551 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
1552 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
1553 mem
= numslots
* sizeof(struct nfsd4_slot
*);
1555 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
1558 /* allocate each struct nfsd4_slot and data cache in one piece */
1559 for (i
= 0; i
< numslots
; i
++) {
1560 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
1561 if (!new->se_slots
[i
])
1565 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
1566 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
1571 kfree(new->se_slots
[i
]);
1576 static void free_conn(struct nfsd4_conn
*c
)
1578 svc_xprt_put(c
->cn_xprt
);
1582 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1584 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1585 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1587 spin_lock(&clp
->cl_lock
);
1588 if (!list_empty(&c
->cn_persession
)) {
1589 list_del(&c
->cn_persession
);
1592 nfsd4_probe_callback(clp
);
1593 spin_unlock(&clp
->cl_lock
);
1596 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1598 struct nfsd4_conn
*conn
;
1600 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1603 svc_xprt_get(rqstp
->rq_xprt
);
1604 conn
->cn_xprt
= rqstp
->rq_xprt
;
1605 conn
->cn_flags
= flags
;
1606 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1610 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1612 conn
->cn_session
= ses
;
1613 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1616 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1618 struct nfs4_client
*clp
= ses
->se_client
;
1620 spin_lock(&clp
->cl_lock
);
1621 __nfsd4_hash_conn(conn
, ses
);
1622 spin_unlock(&clp
->cl_lock
);
1625 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1627 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1628 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1631 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1635 nfsd4_hash_conn(conn
, ses
);
1636 ret
= nfsd4_register_conn(conn
);
1638 /* oops; xprt is already down: */
1639 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1640 /* We may have gained or lost a callback channel: */
1641 nfsd4_probe_callback_sync(ses
->se_client
);
1644 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1646 u32 dir
= NFS4_CDFC4_FORE
;
1648 if (cses
->flags
& SESSION4_BACK_CHAN
)
1649 dir
|= NFS4_CDFC4_BACK
;
1650 return alloc_conn(rqstp
, dir
);
1653 /* must be called under client_lock */
1654 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1656 struct nfs4_client
*clp
= s
->se_client
;
1657 struct nfsd4_conn
*c
;
1659 spin_lock(&clp
->cl_lock
);
1660 while (!list_empty(&s
->se_conns
)) {
1661 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1662 list_del_init(&c
->cn_persession
);
1663 spin_unlock(&clp
->cl_lock
);
1665 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1668 spin_lock(&clp
->cl_lock
);
1670 spin_unlock(&clp
->cl_lock
);
1673 static void __free_session(struct nfsd4_session
*ses
)
1675 free_session_slots(ses
);
1679 static void free_session(struct nfsd4_session
*ses
)
1681 nfsd4_del_conns(ses
);
1682 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1683 __free_session(ses
);
1686 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1689 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1691 new->se_client
= clp
;
1694 INIT_LIST_HEAD(&new->se_conns
);
1696 new->se_cb_seq_nr
= 1;
1697 new->se_flags
= cses
->flags
;
1698 new->se_cb_prog
= cses
->callback_prog
;
1699 new->se_cb_sec
= cses
->cb_sec
;
1700 atomic_set(&new->se_ref
, 0);
1701 idx
= hash_sessionid(&new->se_sessionid
);
1702 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1703 spin_lock(&clp
->cl_lock
);
1704 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1705 spin_unlock(&clp
->cl_lock
);
1708 struct sockaddr
*sa
= svc_addr(rqstp
);
1710 * This is a little silly; with sessions there's no real
1711 * use for the callback address. Use the peer address
1712 * as a reasonable default for now, but consider fixing
1713 * the rpc client not to require an address in the
1716 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1717 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1721 /* caller must hold client_lock */
1722 static struct nfsd4_session
*
1723 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1725 struct nfsd4_session
*elem
;
1727 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1729 lockdep_assert_held(&nn
->client_lock
);
1731 dump_sessionid(__func__
, sessionid
);
1732 idx
= hash_sessionid(sessionid
);
1733 /* Search in the appropriate list */
1734 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1735 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1736 NFS4_MAX_SESSIONID_LEN
)) {
1741 dprintk("%s: session not found\n", __func__
);
1745 static struct nfsd4_session
*
1746 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1749 struct nfsd4_session
*session
;
1750 __be32 status
= nfserr_badsession
;
1752 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1755 status
= nfsd4_get_session_locked(session
);
1763 /* caller must hold client_lock */
1765 unhash_session(struct nfsd4_session
*ses
)
1767 struct nfs4_client
*clp
= ses
->se_client
;
1768 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1770 lockdep_assert_held(&nn
->client_lock
);
1772 list_del(&ses
->se_hash
);
1773 spin_lock(&ses
->se_client
->cl_lock
);
1774 list_del(&ses
->se_perclnt
);
1775 spin_unlock(&ses
->se_client
->cl_lock
);
1778 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1780 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1783 * We're assuming the clid was not given out from a boot
1784 * precisely 2^32 (about 136 years) before this one. That seems
1785 * a safe assumption:
1787 if (clid
->cl_boot
== (u32
)nn
->boot_time
)
1789 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1790 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1795 * XXX Should we use a slab cache ?
1796 * This type of memory management is somewhat inefficient, but we use it
1797 * anyway since SETCLIENTID is not a common operation.
1799 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1801 struct nfs4_client
*clp
;
1804 clp
= kmem_cache_zalloc(client_slab
, GFP_KERNEL
);
1807 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1808 if (clp
->cl_name
.data
== NULL
)
1810 clp
->cl_ownerstr_hashtbl
= kmalloc_array(OWNER_HASH_SIZE
,
1811 sizeof(struct list_head
),
1813 if (!clp
->cl_ownerstr_hashtbl
)
1814 goto err_no_hashtbl
;
1815 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
1816 INIT_LIST_HEAD(&clp
->cl_ownerstr_hashtbl
[i
]);
1817 clp
->cl_name
.len
= name
.len
;
1818 INIT_LIST_HEAD(&clp
->cl_sessions
);
1819 idr_init(&clp
->cl_stateids
);
1820 atomic_set(&clp
->cl_refcount
, 0);
1821 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1822 INIT_LIST_HEAD(&clp
->cl_idhash
);
1823 INIT_LIST_HEAD(&clp
->cl_openowners
);
1824 INIT_LIST_HEAD(&clp
->cl_delegations
);
1825 INIT_LIST_HEAD(&clp
->cl_lru
);
1826 INIT_LIST_HEAD(&clp
->cl_revoked
);
1827 #ifdef CONFIG_NFSD_PNFS
1828 INIT_LIST_HEAD(&clp
->cl_lo_states
);
1830 spin_lock_init(&clp
->cl_lock
);
1831 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1834 kfree(clp
->cl_name
.data
);
1836 kmem_cache_free(client_slab
, clp
);
1841 free_client(struct nfs4_client
*clp
)
1843 while (!list_empty(&clp
->cl_sessions
)) {
1844 struct nfsd4_session
*ses
;
1845 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1847 list_del(&ses
->se_perclnt
);
1848 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1851 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1852 free_svc_cred(&clp
->cl_cred
);
1853 kfree(clp
->cl_ownerstr_hashtbl
);
1854 kfree(clp
->cl_name
.data
);
1855 idr_destroy(&clp
->cl_stateids
);
1856 kmem_cache_free(client_slab
, clp
);
1859 /* must be called under the client_lock */
1861 unhash_client_locked(struct nfs4_client
*clp
)
1863 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1864 struct nfsd4_session
*ses
;
1866 lockdep_assert_held(&nn
->client_lock
);
1868 /* Mark the client as expired! */
1870 /* Make it invisible */
1871 if (!list_empty(&clp
->cl_idhash
)) {
1872 list_del_init(&clp
->cl_idhash
);
1873 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1874 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1876 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1878 list_del_init(&clp
->cl_lru
);
1879 spin_lock(&clp
->cl_lock
);
1880 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1881 list_del_init(&ses
->se_hash
);
1882 spin_unlock(&clp
->cl_lock
);
1886 unhash_client(struct nfs4_client
*clp
)
1888 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1890 spin_lock(&nn
->client_lock
);
1891 unhash_client_locked(clp
);
1892 spin_unlock(&nn
->client_lock
);
1895 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
1897 if (atomic_read(&clp
->cl_refcount
))
1898 return nfserr_jukebox
;
1899 unhash_client_locked(clp
);
1904 __destroy_client(struct nfs4_client
*clp
)
1907 struct nfs4_openowner
*oo
;
1908 struct nfs4_delegation
*dp
;
1909 struct list_head reaplist
;
1911 INIT_LIST_HEAD(&reaplist
);
1912 spin_lock(&state_lock
);
1913 while (!list_empty(&clp
->cl_delegations
)) {
1914 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1915 WARN_ON(!unhash_delegation_locked(dp
));
1916 list_add(&dp
->dl_recall_lru
, &reaplist
);
1918 spin_unlock(&state_lock
);
1919 while (!list_empty(&reaplist
)) {
1920 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1921 list_del_init(&dp
->dl_recall_lru
);
1922 destroy_unhashed_deleg(dp
);
1924 while (!list_empty(&clp
->cl_revoked
)) {
1925 dp
= list_entry(clp
->cl_revoked
.next
, struct nfs4_delegation
, dl_recall_lru
);
1926 list_del_init(&dp
->dl_recall_lru
);
1927 nfs4_put_stid(&dp
->dl_stid
);
1929 while (!list_empty(&clp
->cl_openowners
)) {
1930 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1931 nfs4_get_stateowner(&oo
->oo_owner
);
1932 release_openowner(oo
);
1934 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
1935 struct nfs4_stateowner
*so
, *tmp
;
1937 list_for_each_entry_safe(so
, tmp
, &clp
->cl_ownerstr_hashtbl
[i
],
1939 /* Should be no openowners at this point */
1940 WARN_ON_ONCE(so
->so_is_open_owner
);
1941 remove_blocked_locks(lockowner(so
));
1944 nfsd4_return_all_client_layouts(clp
);
1945 nfsd4_shutdown_callback(clp
);
1946 if (clp
->cl_cb_conn
.cb_xprt
)
1947 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1952 destroy_client(struct nfs4_client
*clp
)
1955 __destroy_client(clp
);
1958 static void expire_client(struct nfs4_client
*clp
)
1961 nfsd4_client_record_remove(clp
);
1962 __destroy_client(clp
);
1965 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1967 memcpy(target
->cl_verifier
.data
, source
->data
,
1968 sizeof(target
->cl_verifier
.data
));
1971 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1973 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1974 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1977 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1979 target
->cr_principal
= kstrdup(source
->cr_principal
, GFP_KERNEL
);
1980 target
->cr_raw_principal
= kstrdup(source
->cr_raw_principal
,
1982 if ((source
->cr_principal
&& ! target
->cr_principal
) ||
1983 (source
->cr_raw_principal
&& ! target
->cr_raw_principal
))
1986 target
->cr_flavor
= source
->cr_flavor
;
1987 target
->cr_uid
= source
->cr_uid
;
1988 target
->cr_gid
= source
->cr_gid
;
1989 target
->cr_group_info
= source
->cr_group_info
;
1990 get_group_info(target
->cr_group_info
);
1991 target
->cr_gss_mech
= source
->cr_gss_mech
;
1992 if (source
->cr_gss_mech
)
1993 gss_mech_get(source
->cr_gss_mech
);
1998 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
2000 if (o1
->len
< o2
->len
)
2002 if (o1
->len
> o2
->len
)
2004 return memcmp(o1
->data
, o2
->data
, o1
->len
);
2007 static int same_name(const char *n1
, const char *n2
)
2009 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
2013 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
2015 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
2019 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
2021 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
2024 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
2028 if (g1
->ngroups
!= g2
->ngroups
)
2030 for (i
=0; i
<g1
->ngroups
; i
++)
2031 if (!gid_eq(g1
->gid
[i
], g2
->gid
[i
]))
2037 * RFC 3530 language requires clid_inuse be returned when the
2038 * "principal" associated with a requests differs from that previously
2039 * used. We use uid, gid's, and gss principal string as our best
2040 * approximation. We also don't want to allow non-gss use of a client
2041 * established using gss: in theory cr_principal should catch that
2042 * change, but in practice cr_principal can be null even in the gss case
2043 * since gssd doesn't always pass down a principal string.
2045 static bool is_gss_cred(struct svc_cred
*cr
)
2047 /* Is cr_flavor one of the gss "pseudoflavors"?: */
2048 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
2053 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
2055 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
2056 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
2057 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
2058 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
2060 if (cr1
->cr_principal
== cr2
->cr_principal
)
2062 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
2064 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
2067 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
2069 struct svc_cred
*cr
= &rqstp
->rq_cred
;
2072 if (!cr
->cr_gss_mech
)
2074 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
2075 return service
== RPC_GSS_SVC_INTEGRITY
||
2076 service
== RPC_GSS_SVC_PRIVACY
;
2079 bool nfsd4_mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
2081 struct svc_cred
*cr
= &rqstp
->rq_cred
;
2083 if (!cl
->cl_mach_cred
)
2085 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
2087 if (!svc_rqst_integrity_protected(rqstp
))
2089 if (cl
->cl_cred
.cr_raw_principal
)
2090 return 0 == strcmp(cl
->cl_cred
.cr_raw_principal
,
2091 cr
->cr_raw_principal
);
2092 if (!cr
->cr_principal
)
2094 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
2097 static void gen_confirm(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
2102 * This is opaque to client, so no need to byte-swap. Use
2103 * __force to keep sparse happy
2105 verf
[0] = (__force __be32
)get_seconds();
2106 verf
[1] = (__force __be32
)nn
->clverifier_counter
++;
2107 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
2110 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
2112 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
2113 clp
->cl_clientid
.cl_id
= nn
->clientid_counter
++;
2114 gen_confirm(clp
, nn
);
2117 static struct nfs4_stid
*
2118 find_stateid_locked(struct nfs4_client
*cl
, stateid_t
*t
)
2120 struct nfs4_stid
*ret
;
2122 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
2123 if (!ret
|| !ret
->sc_type
)
2128 static struct nfs4_stid
*
2129 find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
2131 struct nfs4_stid
*s
;
2133 spin_lock(&cl
->cl_lock
);
2134 s
= find_stateid_locked(cl
, t
);
2136 if (typemask
& s
->sc_type
)
2137 refcount_inc(&s
->sc_count
);
2141 spin_unlock(&cl
->cl_lock
);
2145 static struct nfs4_client
*create_client(struct xdr_netobj name
,
2146 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
2148 struct nfs4_client
*clp
;
2149 struct sockaddr
*sa
= svc_addr(rqstp
);
2151 struct net
*net
= SVC_NET(rqstp
);
2153 clp
= alloc_client(name
);
2157 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
2162 nfsd4_init_cb(&clp
->cl_cb_null
, clp
, NULL
, NFSPROC4_CLNT_CB_NULL
);
2163 clp
->cl_time
= get_seconds();
2164 clear_bit(0, &clp
->cl_cb_slot_busy
);
2165 copy_verf(clp
, verf
);
2166 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
2167 clp
->cl_cb_session
= NULL
;
2173 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
2175 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
2176 struct nfs4_client
*clp
;
2179 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
2182 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
2183 new = &((*new)->rb_left
);
2185 new = &((*new)->rb_right
);
2188 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
2189 rb_insert_color(&new_clp
->cl_namenode
, root
);
2192 static struct nfs4_client
*
2193 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
2196 struct rb_node
*node
= root
->rb_node
;
2197 struct nfs4_client
*clp
;
2200 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
2201 cmp
= compare_blob(&clp
->cl_name
, name
);
2203 node
= node
->rb_left
;
2205 node
= node
->rb_right
;
2213 add_to_unconfirmed(struct nfs4_client
*clp
)
2215 unsigned int idhashval
;
2216 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2218 lockdep_assert_held(&nn
->client_lock
);
2220 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
2221 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
2222 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
2223 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
2224 renew_client_locked(clp
);
2228 move_to_confirmed(struct nfs4_client
*clp
)
2230 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
2231 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2233 lockdep_assert_held(&nn
->client_lock
);
2235 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
2236 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
2237 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
2238 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
2239 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
2240 renew_client_locked(clp
);
2243 static struct nfs4_client
*
2244 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
2246 struct nfs4_client
*clp
;
2247 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
2249 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
2250 if (same_clid(&clp
->cl_clientid
, clid
)) {
2251 if ((bool)clp
->cl_minorversion
!= sessions
)
2253 renew_client_locked(clp
);
2260 static struct nfs4_client
*
2261 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
2263 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
2265 lockdep_assert_held(&nn
->client_lock
);
2266 return find_client_in_id_table(tbl
, clid
, sessions
);
2269 static struct nfs4_client
*
2270 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
2272 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
2274 lockdep_assert_held(&nn
->client_lock
);
2275 return find_client_in_id_table(tbl
, clid
, sessions
);
2278 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
2280 return clp
->cl_exchange_flags
!= 0;
2283 static struct nfs4_client
*
2284 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2286 lockdep_assert_held(&nn
->client_lock
);
2287 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
2290 static struct nfs4_client
*
2291 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2293 lockdep_assert_held(&nn
->client_lock
);
2294 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
2298 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
2300 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
2301 struct sockaddr
*sa
= svc_addr(rqstp
);
2302 u32 scopeid
= rpc_get_scope_id(sa
);
2303 unsigned short expected_family
;
2305 /* Currently, we only support tcp and tcp6 for the callback channel */
2306 if (se
->se_callback_netid_len
== 3 &&
2307 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
2308 expected_family
= AF_INET
;
2309 else if (se
->se_callback_netid_len
== 4 &&
2310 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
2311 expected_family
= AF_INET6
;
2315 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
2316 se
->se_callback_addr_len
,
2317 (struct sockaddr
*)&conn
->cb_addr
,
2318 sizeof(conn
->cb_addr
));
2320 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
2323 if (conn
->cb_addr
.ss_family
== AF_INET6
)
2324 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
2326 conn
->cb_prog
= se
->se_callback_prog
;
2327 conn
->cb_ident
= se
->se_callback_ident
;
2328 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
2331 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
2332 conn
->cb_addrlen
= 0;
2333 dprintk("NFSD: this client (clientid %08x/%08x) "
2334 "will not receive delegations\n",
2335 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
2341 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2344 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
2346 struct xdr_buf
*buf
= resp
->xdr
.buf
;
2347 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2350 dprintk("--> %s slot %p\n", __func__
, slot
);
2352 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
2353 slot
->sl_opcnt
= resp
->opcnt
;
2354 slot
->sl_status
= resp
->cstate
.status
;
2355 free_svc_cred(&slot
->sl_cred
);
2356 copy_cred(&slot
->sl_cred
, &resp
->rqstp
->rq_cred
);
2358 if (!nfsd4_cache_this(resp
)) {
2359 slot
->sl_flags
&= ~NFSD4_SLOT_CACHED
;
2362 slot
->sl_flags
|= NFSD4_SLOT_CACHED
;
2364 base
= resp
->cstate
.data_offset
;
2365 slot
->sl_datalen
= buf
->len
- base
;
2366 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
2367 WARN(1, "%s: sessions DRC could not cache compound\n",
2373 * Encode the replay sequence operation from the slot values.
2374 * If cachethis is FALSE encode the uncached rep error on the next
2375 * operation which sets resp->p and increments resp->opcnt for
2376 * nfs4svc_encode_compoundres.
2380 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
2381 struct nfsd4_compoundres
*resp
)
2383 struct nfsd4_op
*op
;
2384 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2386 /* Encode the replayed sequence operation */
2387 op
= &args
->ops
[resp
->opcnt
- 1];
2388 nfsd4_encode_operation(resp
, op
);
2390 if (slot
->sl_flags
& NFSD4_SLOT_CACHED
)
2392 if (args
->opcnt
== 1) {
2394 * The original operation wasn't a solo sequence--we
2395 * always cache those--so this retry must not match the
2398 op
->status
= nfserr_seq_false_retry
;
2400 op
= &args
->ops
[resp
->opcnt
++];
2401 op
->status
= nfserr_retry_uncached_rep
;
2402 nfsd4_encode_operation(resp
, op
);
2408 * The sequence operation is not cached because we can use the slot and
2412 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
2413 struct nfsd4_sequence
*seq
)
2415 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2416 struct xdr_stream
*xdr
= &resp
->xdr
;
2420 dprintk("--> %s slot %p\n", __func__
, slot
);
2422 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
2426 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
2429 return nfserr_serverfault
;
2431 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
2432 xdr_commit_encode(xdr
);
2434 resp
->opcnt
= slot
->sl_opcnt
;
2435 return slot
->sl_status
;
2439 * Set the exchange_id flags returned by the server.
2442 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
2444 #ifdef CONFIG_NFSD_PNFS
2445 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_PNFS_MDS
;
2447 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
2450 /* Referrals are supported, Migration is not. */
2451 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
2453 /* set the wire flags to return to client. */
2454 clid
->flags
= new->cl_exchange_flags
;
2457 static bool client_has_openowners(struct nfs4_client
*clp
)
2459 struct nfs4_openowner
*oo
;
2461 list_for_each_entry(oo
, &clp
->cl_openowners
, oo_perclient
) {
2462 if (!list_empty(&oo
->oo_owner
.so_stateids
))
2468 static bool client_has_state(struct nfs4_client
*clp
)
2470 return client_has_openowners(clp
)
2471 #ifdef CONFIG_NFSD_PNFS
2472 || !list_empty(&clp
->cl_lo_states
)
2474 || !list_empty(&clp
->cl_delegations
)
2475 || !list_empty(&clp
->cl_sessions
);
2479 nfsd4_exchange_id(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2480 union nfsd4_op_u
*u
)
2482 struct nfsd4_exchange_id
*exid
= &u
->exchange_id
;
2483 struct nfs4_client
*conf
, *new;
2484 struct nfs4_client
*unconf
= NULL
;
2486 char addr_str
[INET6_ADDRSTRLEN
];
2487 nfs4_verifier verf
= exid
->verifier
;
2488 struct sockaddr
*sa
= svc_addr(rqstp
);
2489 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
2490 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2492 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
2493 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2494 "ip_addr=%s flags %x, spa_how %d\n",
2495 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
2496 addr_str
, exid
->flags
, exid
->spa_how
);
2498 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
2499 return nfserr_inval
;
2501 new = create_client(exid
->clname
, rqstp
, &verf
);
2503 return nfserr_jukebox
;
2505 switch (exid
->spa_how
) {
2507 exid
->spo_must_enforce
[0] = 0;
2508 exid
->spo_must_enforce
[1] = (
2509 1 << (OP_BIND_CONN_TO_SESSION
- 32) |
2510 1 << (OP_EXCHANGE_ID
- 32) |
2511 1 << (OP_CREATE_SESSION
- 32) |
2512 1 << (OP_DESTROY_SESSION
- 32) |
2513 1 << (OP_DESTROY_CLIENTID
- 32));
2515 exid
->spo_must_allow
[0] &= (1 << (OP_CLOSE
) |
2516 1 << (OP_OPEN_DOWNGRADE
) |
2518 1 << (OP_DELEGRETURN
));
2520 exid
->spo_must_allow
[1] &= (
2521 1 << (OP_TEST_STATEID
- 32) |
2522 1 << (OP_FREE_STATEID
- 32));
2523 if (!svc_rqst_integrity_protected(rqstp
)) {
2524 status
= nfserr_inval
;
2528 * Sometimes userspace doesn't give us a principal.
2529 * Which is a bug, really. Anyway, we can't enforce
2530 * MACH_CRED in that case, better to give up now:
2532 if (!new->cl_cred
.cr_principal
&&
2533 !new->cl_cred
.cr_raw_principal
) {
2534 status
= nfserr_serverfault
;
2537 new->cl_mach_cred
= true;
2540 default: /* checked by xdr code */
2543 status
= nfserr_encr_alg_unsupp
;
2547 /* Cases below refer to rfc 5661 section 18.35.4: */
2548 spin_lock(&nn
->client_lock
);
2549 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
2551 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
2552 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
2555 if (!clp_used_exchangeid(conf
)) { /* buggy client */
2556 status
= nfserr_inval
;
2559 if (!nfsd4_mach_creds_match(conf
, rqstp
)) {
2560 status
= nfserr_wrong_cred
;
2563 if (!creds_match
) { /* case 9 */
2564 status
= nfserr_perm
;
2567 if (!verfs_match
) { /* case 8 */
2568 status
= nfserr_not_same
;
2572 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2575 if (!creds_match
) { /* case 3 */
2576 if (client_has_state(conf
)) {
2577 status
= nfserr_clid_inuse
;
2582 if (verfs_match
) { /* case 2 */
2583 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2586 /* case 5, client reboot */
2591 if (update
) { /* case 7 */
2592 status
= nfserr_noent
;
2596 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
2597 if (unconf
) /* case 4, possible retry or client restart */
2598 unhash_client_locked(unconf
);
2600 /* case 1 (normal case) */
2603 status
= mark_client_expired_locked(conf
);
2607 new->cl_minorversion
= cstate
->minorversion
;
2608 new->cl_spo_must_allow
.u
.words
[0] = exid
->spo_must_allow
[0];
2609 new->cl_spo_must_allow
.u
.words
[1] = exid
->spo_must_allow
[1];
2612 add_to_unconfirmed(new);
2615 exid
->clientid
.cl_boot
= conf
->cl_clientid
.cl_boot
;
2616 exid
->clientid
.cl_id
= conf
->cl_clientid
.cl_id
;
2618 exid
->seqid
= conf
->cl_cs_slot
.sl_seqid
+ 1;
2619 nfsd4_set_ex_flags(conf
, exid
);
2621 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2622 conf
->cl_cs_slot
.sl_seqid
, conf
->cl_exchange_flags
);
2626 spin_unlock(&nn
->client_lock
);
2631 expire_client(unconf
);
2636 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
2638 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
2641 /* The slot is in use, and no response has been sent. */
2643 if (seqid
== slot_seqid
)
2644 return nfserr_jukebox
;
2646 return nfserr_seq_misordered
;
2648 /* Note unsigned 32-bit arithmetic handles wraparound: */
2649 if (likely(seqid
== slot_seqid
+ 1))
2651 if (seqid
== slot_seqid
)
2652 return nfserr_replay_cache
;
2653 return nfserr_seq_misordered
;
2657 * Cache the create session result into the create session single DRC
2658 * slot cache by saving the xdr structure. sl_seqid has been set.
2659 * Do this for solo or embedded create session operations.
2662 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
2663 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
2665 slot
->sl_status
= nfserr
;
2666 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
2670 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
2671 struct nfsd4_clid_slot
*slot
)
2673 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
2674 return slot
->sl_status
;
2677 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2678 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2679 1 + /* MIN tag is length with zero, only length */ \
2680 3 + /* version, opcount, opcode */ \
2681 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2682 /* seqid, slotID, slotID, cache */ \
2683 4 ) * sizeof(__be32))
2685 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2686 2 + /* verifier: AUTH_NULL, length 0 */\
2688 1 + /* MIN tag is length with zero, only length */ \
2689 3 + /* opcount, opcode, opstatus*/ \
2690 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2691 /* seqid, slotID, slotID, slotID, status */ \
2692 5 ) * sizeof(__be32))
2694 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
2696 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
2698 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
2699 return nfserr_toosmall
;
2700 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
2701 return nfserr_toosmall
;
2702 ca
->headerpadsz
= 0;
2703 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
2704 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
2705 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
2706 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
2707 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
2708 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
2710 * Note decreasing slot size below client's request may make it
2711 * difficult for client to function correctly, whereas
2712 * decreasing the number of slots will (just?) affect
2713 * performance. When short on memory we therefore prefer to
2714 * decrease number of slots instead of their size. Clients that
2715 * request larger slots than they need will get poor results:
2717 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2719 return nfserr_jukebox
;
2725 * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
2726 * These are based on similar macros in linux/sunrpc/msg_prot.h .
2728 #define RPC_MAX_HEADER_WITH_AUTH_SYS \
2729 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
2731 #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
2732 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
2734 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2735 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
2736 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2737 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
2740 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2742 ca
->headerpadsz
= 0;
2744 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2745 return nfserr_toosmall
;
2746 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2747 return nfserr_toosmall
;
2748 ca
->maxresp_cached
= 0;
2750 return nfserr_toosmall
;
2755 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2757 switch (cbs
->flavor
) {
2763 * GSS case: the spec doesn't allow us to return this
2764 * error. But it also doesn't allow us not to support
2766 * I'd rather this fail hard than return some error the
2767 * client might think it can already handle:
2769 return nfserr_encr_alg_unsupp
;
2774 nfsd4_create_session(struct svc_rqst
*rqstp
,
2775 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
2777 struct nfsd4_create_session
*cr_ses
= &u
->create_session
;
2778 struct sockaddr
*sa
= svc_addr(rqstp
);
2779 struct nfs4_client
*conf
, *unconf
;
2780 struct nfs4_client
*old
= NULL
;
2781 struct nfsd4_session
*new;
2782 struct nfsd4_conn
*conn
;
2783 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2785 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2787 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2788 return nfserr_inval
;
2789 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2792 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2795 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2797 goto out_release_drc_mem
;
2798 status
= nfserr_jukebox
;
2799 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2801 goto out_release_drc_mem
;
2802 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2804 goto out_free_session
;
2806 spin_lock(&nn
->client_lock
);
2807 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2808 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2809 WARN_ON_ONCE(conf
&& unconf
);
2812 status
= nfserr_wrong_cred
;
2813 if (!nfsd4_mach_creds_match(conf
, rqstp
))
2815 cs_slot
= &conf
->cl_cs_slot
;
2816 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2818 if (status
== nfserr_replay_cache
)
2819 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2822 } else if (unconf
) {
2823 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2824 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2825 status
= nfserr_clid_inuse
;
2828 status
= nfserr_wrong_cred
;
2829 if (!nfsd4_mach_creds_match(unconf
, rqstp
))
2831 cs_slot
= &unconf
->cl_cs_slot
;
2832 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2834 /* an unconfirmed replay returns misordered */
2835 status
= nfserr_seq_misordered
;
2838 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2840 status
= mark_client_expired_locked(old
);
2846 move_to_confirmed(unconf
);
2849 status
= nfserr_stale_clientid
;
2853 /* Persistent sessions are not supported */
2854 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2855 /* Upshifting from TCP to RDMA is not supported */
2856 cr_ses
->flags
&= ~SESSION4_RDMA
;
2858 init_session(rqstp
, new, conf
, cr_ses
);
2859 nfsd4_get_session_locked(new);
2861 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2862 NFS4_MAX_SESSIONID_LEN
);
2863 cs_slot
->sl_seqid
++;
2864 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2866 /* cache solo and embedded create sessions under the client_lock */
2867 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2868 spin_unlock(&nn
->client_lock
);
2869 /* init connection and backchannel */
2870 nfsd4_init_conn(rqstp
, conn
, new);
2871 nfsd4_put_session(new);
2876 spin_unlock(&nn
->client_lock
);
2881 __free_session(new);
2882 out_release_drc_mem
:
2883 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2887 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2890 case NFS4_CDFC4_FORE
:
2891 case NFS4_CDFC4_BACK
:
2893 case NFS4_CDFC4_FORE_OR_BOTH
:
2894 case NFS4_CDFC4_BACK_OR_BOTH
:
2895 *dir
= NFS4_CDFC4_BOTH
;
2898 return nfserr_inval
;
2901 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
,
2902 struct nfsd4_compound_state
*cstate
,
2903 union nfsd4_op_u
*u
)
2905 struct nfsd4_backchannel_ctl
*bc
= &u
->backchannel_ctl
;
2906 struct nfsd4_session
*session
= cstate
->session
;
2907 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2910 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2913 spin_lock(&nn
->client_lock
);
2914 session
->se_cb_prog
= bc
->bc_cb_program
;
2915 session
->se_cb_sec
= bc
->bc_cb_sec
;
2916 spin_unlock(&nn
->client_lock
);
2918 nfsd4_probe_callback(session
->se_client
);
2923 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2924 struct nfsd4_compound_state
*cstate
,
2925 union nfsd4_op_u
*u
)
2927 struct nfsd4_bind_conn_to_session
*bcts
= &u
->bind_conn_to_session
;
2929 struct nfsd4_conn
*conn
;
2930 struct nfsd4_session
*session
;
2931 struct net
*net
= SVC_NET(rqstp
);
2932 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2934 if (!nfsd4_last_compound_op(rqstp
))
2935 return nfserr_not_only_op
;
2936 spin_lock(&nn
->client_lock
);
2937 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2938 spin_unlock(&nn
->client_lock
);
2940 goto out_no_session
;
2941 status
= nfserr_wrong_cred
;
2942 if (!nfsd4_mach_creds_match(session
->se_client
, rqstp
))
2944 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2947 conn
= alloc_conn(rqstp
, bcts
->dir
);
2948 status
= nfserr_jukebox
;
2951 nfsd4_init_conn(rqstp
, conn
, session
);
2954 nfsd4_put_session(session
);
2959 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2963 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2967 nfsd4_destroy_session(struct svc_rqst
*r
, struct nfsd4_compound_state
*cstate
,
2968 union nfsd4_op_u
*u
)
2970 struct nfsd4_destroy_session
*sessionid
= &u
->destroy_session
;
2971 struct nfsd4_session
*ses
;
2973 int ref_held_by_me
= 0;
2974 struct net
*net
= SVC_NET(r
);
2975 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2977 status
= nfserr_not_only_op
;
2978 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2979 if (!nfsd4_last_compound_op(r
))
2983 dump_sessionid(__func__
, &sessionid
->sessionid
);
2984 spin_lock(&nn
->client_lock
);
2985 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2987 goto out_client_lock
;
2988 status
= nfserr_wrong_cred
;
2989 if (!nfsd4_mach_creds_match(ses
->se_client
, r
))
2990 goto out_put_session
;
2991 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2993 goto out_put_session
;
2994 unhash_session(ses
);
2995 spin_unlock(&nn
->client_lock
);
2997 nfsd4_probe_callback_sync(ses
->se_client
);
2999 spin_lock(&nn
->client_lock
);
3002 nfsd4_put_session_locked(ses
);
3004 spin_unlock(&nn
->client_lock
);
3009 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
3011 struct nfsd4_conn
*c
;
3013 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
3014 if (c
->cn_xprt
== xpt
) {
3021 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
3023 struct nfs4_client
*clp
= ses
->se_client
;
3024 struct nfsd4_conn
*c
;
3025 __be32 status
= nfs_ok
;
3028 spin_lock(&clp
->cl_lock
);
3029 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
3032 status
= nfserr_conn_not_bound_to_session
;
3033 if (clp
->cl_mach_cred
)
3035 __nfsd4_hash_conn(new, ses
);
3036 spin_unlock(&clp
->cl_lock
);
3037 ret
= nfsd4_register_conn(new);
3039 /* oops; xprt is already down: */
3040 nfsd4_conn_lost(&new->cn_xpt_user
);
3043 spin_unlock(&clp
->cl_lock
);
3048 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
3050 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
3052 return args
->opcnt
> session
->se_fchannel
.maxops
;
3055 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
3056 struct nfsd4_session
*session
)
3058 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
3060 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
3063 static bool replay_matches_cache(struct svc_rqst
*rqstp
,
3064 struct nfsd4_sequence
*seq
, struct nfsd4_slot
*slot
)
3066 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
3068 if ((bool)(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
) !=
3069 (bool)seq
->cachethis
)
3072 * If there's an error than the reply can have fewer ops than
3073 * the call. But if we cached a reply with *more* ops than the
3074 * call you're sending us now, then this new call is clearly not
3075 * really a replay of the old one:
3077 if (slot
->sl_opcnt
< argp
->opcnt
)
3079 /* This is the only check explicitly called by spec: */
3080 if (!same_creds(&rqstp
->rq_cred
, &slot
->sl_cred
))
3083 * There may be more comparisons we could actually do, but the
3084 * spec doesn't require us to catch every case where the calls
3085 * don't match (that would require caching the call as well as
3086 * the reply), so we don't bother.
3092 nfsd4_sequence(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3093 union nfsd4_op_u
*u
)
3095 struct nfsd4_sequence
*seq
= &u
->sequence
;
3096 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3097 struct xdr_stream
*xdr
= &resp
->xdr
;
3098 struct nfsd4_session
*session
;
3099 struct nfs4_client
*clp
;
3100 struct nfsd4_slot
*slot
;
3101 struct nfsd4_conn
*conn
;
3104 struct net
*net
= SVC_NET(rqstp
);
3105 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3107 if (resp
->opcnt
!= 1)
3108 return nfserr_sequence_pos
;
3111 * Will be either used or freed by nfsd4_sequence_check_conn
3114 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
3116 return nfserr_jukebox
;
3118 spin_lock(&nn
->client_lock
);
3119 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
3121 goto out_no_session
;
3122 clp
= session
->se_client
;
3124 status
= nfserr_too_many_ops
;
3125 if (nfsd4_session_too_many_ops(rqstp
, session
))
3126 goto out_put_session
;
3128 status
= nfserr_req_too_big
;
3129 if (nfsd4_request_too_big(rqstp
, session
))
3130 goto out_put_session
;
3132 status
= nfserr_badslot
;
3133 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
3134 goto out_put_session
;
3136 slot
= session
->se_slots
[seq
->slotid
];
3137 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
3139 /* We do not negotiate the number of slots yet, so set the
3140 * maxslots to the session maxreqs which is used to encode
3141 * sr_highest_slotid and the sr_target_slot id to maxslots */
3142 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
3144 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
3145 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
3146 if (status
== nfserr_replay_cache
) {
3147 status
= nfserr_seq_misordered
;
3148 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
3149 goto out_put_session
;
3150 status
= nfserr_seq_false_retry
;
3151 if (!replay_matches_cache(rqstp
, seq
, slot
))
3152 goto out_put_session
;
3153 cstate
->slot
= slot
;
3154 cstate
->session
= session
;
3156 /* Return the cached reply status and set cstate->status
3157 * for nfsd4_proc_compound processing */
3158 status
= nfsd4_replay_cache_entry(resp
, seq
);
3159 cstate
->status
= nfserr_replay_cache
;
3163 goto out_put_session
;
3165 status
= nfsd4_sequence_check_conn(conn
, session
);
3168 goto out_put_session
;
3170 buflen
= (seq
->cachethis
) ?
3171 session
->se_fchannel
.maxresp_cached
:
3172 session
->se_fchannel
.maxresp_sz
;
3173 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
3175 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
3176 goto out_put_session
;
3177 svc_reserve(rqstp
, buflen
);
3180 /* Success! bump slot seqid */
3181 slot
->sl_seqid
= seq
->seqid
;
3182 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
3184 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
3186 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
3188 cstate
->slot
= slot
;
3189 cstate
->session
= session
;
3193 switch (clp
->cl_cb_state
) {
3195 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
3197 case NFSD4_CB_FAULT
:
3198 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
3201 seq
->status_flags
= 0;
3203 if (!list_empty(&clp
->cl_revoked
))
3204 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
3208 spin_unlock(&nn
->client_lock
);
3211 nfsd4_put_session_locked(session
);
3212 goto out_no_session
;
3216 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
3218 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
3220 if (nfsd4_has_session(cs
)) {
3221 if (cs
->status
!= nfserr_replay_cache
) {
3222 nfsd4_store_cache_entry(resp
);
3223 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
3225 /* Drop session reference that was taken in nfsd4_sequence() */
3226 nfsd4_put_session(cs
->session
);
3228 put_client_renew(cs
->clp
);
3232 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
,
3233 struct nfsd4_compound_state
*cstate
,
3234 union nfsd4_op_u
*u
)
3236 struct nfsd4_destroy_clientid
*dc
= &u
->destroy_clientid
;
3237 struct nfs4_client
*conf
, *unconf
;
3238 struct nfs4_client
*clp
= NULL
;
3240 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3242 spin_lock(&nn
->client_lock
);
3243 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
3244 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
3245 WARN_ON_ONCE(conf
&& unconf
);
3248 if (client_has_state(conf
)) {
3249 status
= nfserr_clientid_busy
;
3252 status
= mark_client_expired_locked(conf
);
3259 status
= nfserr_stale_clientid
;
3262 if (!nfsd4_mach_creds_match(clp
, rqstp
)) {
3264 status
= nfserr_wrong_cred
;
3267 unhash_client_locked(clp
);
3269 spin_unlock(&nn
->client_lock
);
3276 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
,
3277 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
3279 struct nfsd4_reclaim_complete
*rc
= &u
->reclaim_complete
;
3282 if (rc
->rca_one_fs
) {
3283 if (!cstate
->current_fh
.fh_dentry
)
3284 return nfserr_nofilehandle
;
3286 * We don't take advantage of the rca_one_fs case.
3287 * That's OK, it's optional, we can safely ignore it.
3292 status
= nfserr_complete_already
;
3293 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
3294 &cstate
->session
->se_client
->cl_flags
))
3297 status
= nfserr_stale_clientid
;
3298 if (is_client_expired(cstate
->session
->se_client
))
3300 * The following error isn't really legal.
3301 * But we only get here if the client just explicitly
3302 * destroyed the client. Surely it no longer cares what
3303 * error it gets back on an operation for the dead
3309 nfsd4_client_record_create(cstate
->session
->se_client
);
3315 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3316 union nfsd4_op_u
*u
)
3318 struct nfsd4_setclientid
*setclid
= &u
->setclientid
;
3319 struct xdr_netobj clname
= setclid
->se_name
;
3320 nfs4_verifier clverifier
= setclid
->se_verf
;
3321 struct nfs4_client
*conf
, *new;
3322 struct nfs4_client
*unconf
= NULL
;
3324 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3326 new = create_client(clname
, rqstp
, &clverifier
);
3328 return nfserr_jukebox
;
3329 /* Cases below refer to rfc 3530 section 14.2.33: */
3330 spin_lock(&nn
->client_lock
);
3331 conf
= find_confirmed_client_by_name(&clname
, nn
);
3332 if (conf
&& client_has_state(conf
)) {
3334 status
= nfserr_clid_inuse
;
3335 if (clp_used_exchangeid(conf
))
3337 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
3338 char addr_str
[INET6_ADDRSTRLEN
];
3339 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
3341 dprintk("NFSD: setclientid: string in use by client "
3342 "at %s\n", addr_str
);
3346 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
3348 unhash_client_locked(unconf
);
3349 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
)) {
3350 /* case 1: probable callback update */
3351 copy_clid(new, conf
);
3352 gen_confirm(new, nn
);
3353 } else /* case 4 (new client) or cases 2, 3 (client reboot): */
3355 new->cl_minorversion
= 0;
3356 gen_callback(new, setclid
, rqstp
);
3357 add_to_unconfirmed(new);
3358 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
3359 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
3360 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
3364 spin_unlock(&nn
->client_lock
);
3368 expire_client(unconf
);
3374 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
3375 struct nfsd4_compound_state
*cstate
,
3376 union nfsd4_op_u
*u
)
3378 struct nfsd4_setclientid_confirm
*setclientid_confirm
=
3379 &u
->setclientid_confirm
;
3380 struct nfs4_client
*conf
, *unconf
;
3381 struct nfs4_client
*old
= NULL
;
3382 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
3383 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
3385 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3387 if (STALE_CLIENTID(clid
, nn
))
3388 return nfserr_stale_clientid
;
3390 spin_lock(&nn
->client_lock
);
3391 conf
= find_confirmed_client(clid
, false, nn
);
3392 unconf
= find_unconfirmed_client(clid
, false, nn
);
3394 * We try hard to give out unique clientid's, so if we get an
3395 * attempt to confirm the same clientid with a different cred,
3396 * the client may be buggy; this should never happen.
3398 * Nevertheless, RFC 7530 recommends INUSE for this case:
3400 status
= nfserr_clid_inuse
;
3401 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
3403 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
3405 /* cases below refer to rfc 3530 section 14.2.34: */
3406 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
3407 if (conf
&& same_verf(&confirm
, &conf
->cl_confirm
)) {
3408 /* case 2: probable retransmit */
3410 } else /* case 4: client hasn't noticed we rebooted yet? */
3411 status
= nfserr_stale_clientid
;
3415 if (conf
) { /* case 1: callback update */
3417 unhash_client_locked(old
);
3418 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
3419 } else { /* case 3: normal case; new or rebooted client */
3420 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
3422 status
= nfserr_clid_inuse
;
3423 if (client_has_state(old
)
3424 && !same_creds(&unconf
->cl_cred
,
3427 status
= mark_client_expired_locked(old
);
3433 move_to_confirmed(unconf
);
3436 get_client_locked(conf
);
3437 spin_unlock(&nn
->client_lock
);
3438 nfsd4_probe_callback(conf
);
3439 spin_lock(&nn
->client_lock
);
3440 put_client_renew_locked(conf
);
3442 spin_unlock(&nn
->client_lock
);
3448 static struct nfs4_file
*nfsd4_alloc_file(void)
3450 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
3453 /* OPEN Share state helper functions */
3454 static void nfsd4_init_file(struct knfsd_fh
*fh
, unsigned int hashval
,
3455 struct nfs4_file
*fp
)
3457 lockdep_assert_held(&state_lock
);
3459 refcount_set(&fp
->fi_ref
, 1);
3460 spin_lock_init(&fp
->fi_lock
);
3461 INIT_LIST_HEAD(&fp
->fi_stateids
);
3462 INIT_LIST_HEAD(&fp
->fi_delegations
);
3463 INIT_LIST_HEAD(&fp
->fi_clnt_odstate
);
3464 fh_copy_shallow(&fp
->fi_fhandle
, fh
);
3465 fp
->fi_deleg_file
= NULL
;
3466 fp
->fi_had_conflict
= false;
3467 fp
->fi_share_deny
= 0;
3468 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
3469 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
3470 #ifdef CONFIG_NFSD_PNFS
3471 INIT_LIST_HEAD(&fp
->fi_lo_states
);
3472 atomic_set(&fp
->fi_lo_recalls
, 0);
3474 hlist_add_head_rcu(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
3478 nfsd4_free_slabs(void)
3480 kmem_cache_destroy(client_slab
);
3481 kmem_cache_destroy(openowner_slab
);
3482 kmem_cache_destroy(lockowner_slab
);
3483 kmem_cache_destroy(file_slab
);
3484 kmem_cache_destroy(stateid_slab
);
3485 kmem_cache_destroy(deleg_slab
);
3486 kmem_cache_destroy(odstate_slab
);
3490 nfsd4_init_slabs(void)
3492 client_slab
= kmem_cache_create("nfsd4_clients",
3493 sizeof(struct nfs4_client
), 0, 0, NULL
);
3494 if (client_slab
== NULL
)
3496 openowner_slab
= kmem_cache_create("nfsd4_openowners",
3497 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
3498 if (openowner_slab
== NULL
)
3499 goto out_free_client_slab
;
3500 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
3501 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
3502 if (lockowner_slab
== NULL
)
3503 goto out_free_openowner_slab
;
3504 file_slab
= kmem_cache_create("nfsd4_files",
3505 sizeof(struct nfs4_file
), 0, 0, NULL
);
3506 if (file_slab
== NULL
)
3507 goto out_free_lockowner_slab
;
3508 stateid_slab
= kmem_cache_create("nfsd4_stateids",
3509 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
3510 if (stateid_slab
== NULL
)
3511 goto out_free_file_slab
;
3512 deleg_slab
= kmem_cache_create("nfsd4_delegations",
3513 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
3514 if (deleg_slab
== NULL
)
3515 goto out_free_stateid_slab
;
3516 odstate_slab
= kmem_cache_create("nfsd4_odstate",
3517 sizeof(struct nfs4_clnt_odstate
), 0, 0, NULL
);
3518 if (odstate_slab
== NULL
)
3519 goto out_free_deleg_slab
;
3522 out_free_deleg_slab
:
3523 kmem_cache_destroy(deleg_slab
);
3524 out_free_stateid_slab
:
3525 kmem_cache_destroy(stateid_slab
);
3527 kmem_cache_destroy(file_slab
);
3528 out_free_lockowner_slab
:
3529 kmem_cache_destroy(lockowner_slab
);
3530 out_free_openowner_slab
:
3531 kmem_cache_destroy(openowner_slab
);
3532 out_free_client_slab
:
3533 kmem_cache_destroy(client_slab
);
3535 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3539 static void init_nfs4_replay(struct nfs4_replay
*rp
)
3541 rp
->rp_status
= nfserr_serverfault
;
3543 rp
->rp_buf
= rp
->rp_ibuf
;
3544 mutex_init(&rp
->rp_mutex
);
3547 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state
*cstate
,
3548 struct nfs4_stateowner
*so
)
3550 if (!nfsd4_has_session(cstate
)) {
3551 mutex_lock(&so
->so_replay
.rp_mutex
);
3552 cstate
->replay_owner
= nfs4_get_stateowner(so
);
3556 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state
*cstate
)
3558 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
3561 cstate
->replay_owner
= NULL
;
3562 mutex_unlock(&so
->so_replay
.rp_mutex
);
3563 nfs4_put_stateowner(so
);
3567 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
3569 struct nfs4_stateowner
*sop
;
3571 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
3575 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
3576 if (!sop
->so_owner
.data
) {
3577 kmem_cache_free(slab
, sop
);
3580 sop
->so_owner
.len
= owner
->len
;
3582 INIT_LIST_HEAD(&sop
->so_stateids
);
3583 sop
->so_client
= clp
;
3584 init_nfs4_replay(&sop
->so_replay
);
3585 atomic_set(&sop
->so_count
, 1);
3589 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
3591 lockdep_assert_held(&clp
->cl_lock
);
3593 list_add(&oo
->oo_owner
.so_strhash
,
3594 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
3595 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
3598 static void nfs4_unhash_openowner(struct nfs4_stateowner
*so
)
3600 unhash_openowner_locked(openowner(so
));
3603 static void nfs4_free_openowner(struct nfs4_stateowner
*so
)
3605 struct nfs4_openowner
*oo
= openowner(so
);
3607 kmem_cache_free(openowner_slab
, oo
);
3610 static const struct nfs4_stateowner_operations openowner_ops
= {
3611 .so_unhash
= nfs4_unhash_openowner
,
3612 .so_free
= nfs4_free_openowner
,
3615 static struct nfs4_ol_stateid
*
3616 nfsd4_find_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3618 struct nfs4_ol_stateid
*local
, *ret
= NULL
;
3619 struct nfs4_openowner
*oo
= open
->op_openowner
;
3621 lockdep_assert_held(&fp
->fi_lock
);
3623 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3624 /* ignore lock owners */
3625 if (local
->st_stateowner
->so_is_open_owner
== 0)
3627 if (local
->st_stateowner
!= &oo
->oo_owner
)
3629 if (local
->st_stid
.sc_type
== NFS4_OPEN_STID
) {
3631 refcount_inc(&ret
->st_stid
.sc_count
);
3639 nfsd4_verify_open_stid(struct nfs4_stid
*s
)
3641 __be32 ret
= nfs_ok
;
3643 switch (s
->sc_type
) {
3647 case NFS4_CLOSED_STID
:
3648 case NFS4_CLOSED_DELEG_STID
:
3649 ret
= nfserr_bad_stateid
;
3651 case NFS4_REVOKED_DELEG_STID
:
3652 ret
= nfserr_deleg_revoked
;
3657 /* Lock the stateid st_mutex, and deal with races with CLOSE */
3659 nfsd4_lock_ol_stateid(struct nfs4_ol_stateid
*stp
)
3663 mutex_lock_nested(&stp
->st_mutex
, LOCK_STATEID_MUTEX
);
3664 ret
= nfsd4_verify_open_stid(&stp
->st_stid
);
3666 mutex_unlock(&stp
->st_mutex
);
3670 static struct nfs4_ol_stateid
*
3671 nfsd4_find_and_lock_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3673 struct nfs4_ol_stateid
*stp
;
3675 spin_lock(&fp
->fi_lock
);
3676 stp
= nfsd4_find_existing_open(fp
, open
);
3677 spin_unlock(&fp
->fi_lock
);
3678 if (!stp
|| nfsd4_lock_ol_stateid(stp
) == nfs_ok
)
3680 nfs4_put_stid(&stp
->st_stid
);
3685 static struct nfs4_openowner
*
3686 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
3687 struct nfsd4_compound_state
*cstate
)
3689 struct nfs4_client
*clp
= cstate
->clp
;
3690 struct nfs4_openowner
*oo
, *ret
;
3692 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
3695 oo
->oo_owner
.so_ops
= &openowner_ops
;
3696 oo
->oo_owner
.so_is_open_owner
= 1;
3697 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
3699 if (nfsd4_has_session(cstate
))
3700 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3702 oo
->oo_last_closed_stid
= NULL
;
3703 INIT_LIST_HEAD(&oo
->oo_close_lru
);
3704 spin_lock(&clp
->cl_lock
);
3705 ret
= find_openstateowner_str_locked(strhashval
, open
, clp
);
3707 hash_openowner(oo
, clp
, strhashval
);
3710 nfs4_free_stateowner(&oo
->oo_owner
);
3712 spin_unlock(&clp
->cl_lock
);
3716 static struct nfs4_ol_stateid
*
3717 init_open_stateid(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3720 struct nfs4_openowner
*oo
= open
->op_openowner
;
3721 struct nfs4_ol_stateid
*retstp
= NULL
;
3722 struct nfs4_ol_stateid
*stp
;
3725 /* We are moving these outside of the spinlocks to avoid the warnings */
3726 mutex_init(&stp
->st_mutex
);
3727 mutex_lock_nested(&stp
->st_mutex
, OPEN_STATEID_MUTEX
);
3730 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
3731 spin_lock(&fp
->fi_lock
);
3733 retstp
= nfsd4_find_existing_open(fp
, open
);
3737 open
->op_stp
= NULL
;
3738 refcount_inc(&stp
->st_stid
.sc_count
);
3739 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
3740 INIT_LIST_HEAD(&stp
->st_locks
);
3741 stp
->st_stateowner
= nfs4_get_stateowner(&oo
->oo_owner
);
3743 stp
->st_stid
.sc_file
= fp
;
3744 stp
->st_access_bmap
= 0;
3745 stp
->st_deny_bmap
= 0;
3746 stp
->st_openstp
= NULL
;
3747 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
3748 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3751 spin_unlock(&fp
->fi_lock
);
3752 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
3754 /* Handle races with CLOSE */
3755 if (nfsd4_lock_ol_stateid(retstp
) != nfs_ok
) {
3756 nfs4_put_stid(&retstp
->st_stid
);
3759 /* To keep mutex tracking happy */
3760 mutex_unlock(&stp
->st_mutex
);
3767 * In the 4.0 case we need to keep the owners around a little while to handle
3768 * CLOSE replay. We still do need to release any file access that is held by
3769 * them before returning however.
3772 move_to_close_lru(struct nfs4_ol_stateid
*s
, struct net
*net
)
3774 struct nfs4_ol_stateid
*last
;
3775 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
3776 struct nfsd_net
*nn
= net_generic(s
->st_stid
.sc_client
->net
,
3779 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
3782 * We know that we hold one reference via nfsd4_close, and another
3783 * "persistent" reference for the client. If the refcount is higher
3784 * than 2, then there are still calls in progress that are using this
3785 * stateid. We can't put the sc_file reference until they are finished.
3786 * Wait for the refcount to drop to 2. Since it has been unhashed,
3787 * there should be no danger of the refcount going back up again at
3790 wait_event(close_wq
, refcount_read(&s
->st_stid
.sc_count
) == 2);
3792 release_all_access(s
);
3793 if (s
->st_stid
.sc_file
) {
3794 put_nfs4_file(s
->st_stid
.sc_file
);
3795 s
->st_stid
.sc_file
= NULL
;
3798 spin_lock(&nn
->client_lock
);
3799 last
= oo
->oo_last_closed_stid
;
3800 oo
->oo_last_closed_stid
= s
;
3801 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
3802 oo
->oo_time
= get_seconds();
3803 spin_unlock(&nn
->client_lock
);
3805 nfs4_put_stid(&last
->st_stid
);
3808 /* search file_hashtbl[] for file */
3809 static struct nfs4_file
*
3810 find_file_locked(struct knfsd_fh
*fh
, unsigned int hashval
)
3812 struct nfs4_file
*fp
;
3814 hlist_for_each_entry_rcu(fp
, &file_hashtbl
[hashval
], fi_hash
) {
3815 if (fh_match(&fp
->fi_fhandle
, fh
)) {
3816 if (refcount_inc_not_zero(&fp
->fi_ref
))
3824 find_file(struct knfsd_fh
*fh
)
3826 struct nfs4_file
*fp
;
3827 unsigned int hashval
= file_hashval(fh
);
3830 fp
= find_file_locked(fh
, hashval
);
3835 static struct nfs4_file
*
3836 find_or_add_file(struct nfs4_file
*new, struct knfsd_fh
*fh
)
3838 struct nfs4_file
*fp
;
3839 unsigned int hashval
= file_hashval(fh
);
3842 fp
= find_file_locked(fh
, hashval
);
3847 spin_lock(&state_lock
);
3848 fp
= find_file_locked(fh
, hashval
);
3849 if (likely(fp
== NULL
)) {
3850 nfsd4_init_file(fh
, hashval
, new);
3853 spin_unlock(&state_lock
);
3859 * Called to check deny when READ with all zero stateid or
3860 * WRITE with all zero or all one stateid
3863 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
3865 struct nfs4_file
*fp
;
3866 __be32 ret
= nfs_ok
;
3868 fp
= find_file(¤t_fh
->fh_handle
);
3871 /* Check for conflicting share reservations */
3872 spin_lock(&fp
->fi_lock
);
3873 if (fp
->fi_share_deny
& deny_type
)
3874 ret
= nfserr_locked
;
3875 spin_unlock(&fp
->fi_lock
);
3880 static void nfsd4_cb_recall_prepare(struct nfsd4_callback
*cb
)
3882 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3883 struct nfsd_net
*nn
= net_generic(dp
->dl_stid
.sc_client
->net
,
3886 block_delegations(&dp
->dl_stid
.sc_file
->fi_fhandle
);
3889 * We can't do this in nfsd_break_deleg_cb because it is
3890 * already holding inode->i_lock.
3892 * If the dl_time != 0, then we know that it has already been
3893 * queued for a lease break. Don't queue it again.
3895 spin_lock(&state_lock
);
3896 if (dp
->dl_time
== 0) {
3897 dp
->dl_time
= get_seconds();
3898 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
3900 spin_unlock(&state_lock
);
3903 static int nfsd4_cb_recall_done(struct nfsd4_callback
*cb
,
3904 struct rpc_task
*task
)
3906 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3908 if (dp
->dl_stid
.sc_type
== NFS4_CLOSED_DELEG_STID
)
3911 switch (task
->tk_status
) {
3915 case -NFS4ERR_BAD_STATEID
:
3917 * Race: client probably got cb_recall before open reply
3918 * granting delegation.
3920 if (dp
->dl_retries
--) {
3921 rpc_delay(task
, 2 * HZ
);
3930 static void nfsd4_cb_recall_release(struct nfsd4_callback
*cb
)
3932 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3934 nfs4_put_stid(&dp
->dl_stid
);
3937 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops
= {
3938 .prepare
= nfsd4_cb_recall_prepare
,
3939 .done
= nfsd4_cb_recall_done
,
3940 .release
= nfsd4_cb_recall_release
,
3943 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
3946 * We're assuming the state code never drops its reference
3947 * without first removing the lease. Since we're in this lease
3948 * callback (and since the lease code is serialized by the kernel
3949 * lock) we know the server hasn't removed the lease yet, we know
3950 * it's safe to take a reference.
3952 refcount_inc(&dp
->dl_stid
.sc_count
);
3953 nfsd4_run_cb(&dp
->dl_recall
);
3956 /* Called from break_lease() with i_lock held. */
3958 nfsd_break_deleg_cb(struct file_lock
*fl
)
3961 struct nfs4_delegation
*dp
= (struct nfs4_delegation
*)fl
->fl_owner
;
3962 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
3965 * We don't want the locks code to timeout the lease for us;
3966 * we'll remove it ourself if a delegation isn't returned
3969 fl
->fl_break_time
= 0;
3971 spin_lock(&fp
->fi_lock
);
3972 fp
->fi_had_conflict
= true;
3973 nfsd_break_one_deleg(dp
);
3974 spin_unlock(&fp
->fi_lock
);
3979 nfsd_change_deleg_cb(struct file_lock
*onlist
, int arg
,
3980 struct list_head
*dispose
)
3983 return lease_modify(onlist
, arg
, dispose
);
3988 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
3989 .lm_break
= nfsd_break_deleg_cb
,
3990 .lm_change
= nfsd_change_deleg_cb
,
3993 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
3995 if (nfsd4_has_session(cstate
))
3997 if (seqid
== so
->so_seqid
- 1)
3998 return nfserr_replay_me
;
3999 if (seqid
== so
->so_seqid
)
4001 return nfserr_bad_seqid
;
4004 static __be32
lookup_clientid(clientid_t
*clid
,
4005 struct nfsd4_compound_state
*cstate
,
4006 struct nfsd_net
*nn
)
4008 struct nfs4_client
*found
;
4011 found
= cstate
->clp
;
4012 if (!same_clid(&found
->cl_clientid
, clid
))
4013 return nfserr_stale_clientid
;
4017 if (STALE_CLIENTID(clid
, nn
))
4018 return nfserr_stale_clientid
;
4021 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
4022 * cached already then we know this is for is for v4.0 and "sessions"
4025 WARN_ON_ONCE(cstate
->session
);
4026 spin_lock(&nn
->client_lock
);
4027 found
= find_confirmed_client(clid
, false, nn
);
4029 spin_unlock(&nn
->client_lock
);
4030 return nfserr_expired
;
4032 atomic_inc(&found
->cl_refcount
);
4033 spin_unlock(&nn
->client_lock
);
4035 /* Cache the nfs4_client in cstate! */
4036 cstate
->clp
= found
;
4041 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
4042 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
4044 clientid_t
*clientid
= &open
->op_clientid
;
4045 struct nfs4_client
*clp
= NULL
;
4046 unsigned int strhashval
;
4047 struct nfs4_openowner
*oo
= NULL
;
4050 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
4051 return nfserr_stale_clientid
;
4053 * In case we need it later, after we've already created the
4054 * file and don't want to risk a further failure:
4056 open
->op_file
= nfsd4_alloc_file();
4057 if (open
->op_file
== NULL
)
4058 return nfserr_jukebox
;
4060 status
= lookup_clientid(clientid
, cstate
, nn
);
4065 strhashval
= ownerstr_hashval(&open
->op_owner
);
4066 oo
= find_openstateowner_str(strhashval
, open
, clp
);
4067 open
->op_openowner
= oo
;
4071 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
4072 /* Replace unconfirmed owners without checking for replay. */
4073 release_openowner(oo
);
4074 open
->op_openowner
= NULL
;
4077 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
4082 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
4084 return nfserr_jukebox
;
4085 open
->op_openowner
= oo
;
4087 open
->op_stp
= nfs4_alloc_open_stateid(clp
);
4089 return nfserr_jukebox
;
4091 if (nfsd4_has_session(cstate
) &&
4092 (cstate
->current_fh
.fh_export
->ex_flags
& NFSEXP_PNFS
)) {
4093 open
->op_odstate
= alloc_clnt_odstate(clp
);
4094 if (!open
->op_odstate
)
4095 return nfserr_jukebox
;
4101 static inline __be32
4102 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
4104 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
4105 return nfserr_openmode
;
4110 static int share_access_to_flags(u32 share_access
)
4112 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
4115 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
4117 struct nfs4_stid
*ret
;
4119 ret
= find_stateid_by_type(cl
, s
,
4120 NFS4_DELEG_STID
|NFS4_REVOKED_DELEG_STID
);
4123 return delegstateid(ret
);
4126 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
4128 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
4129 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
4133 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
4134 struct nfs4_delegation
**dp
)
4137 __be32 status
= nfserr_bad_stateid
;
4138 struct nfs4_delegation
*deleg
;
4140 deleg
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
4143 if (deleg
->dl_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
) {
4144 nfs4_put_stid(&deleg
->dl_stid
);
4145 if (cl
->cl_minorversion
)
4146 status
= nfserr_deleg_revoked
;
4149 flags
= share_access_to_flags(open
->op_share_access
);
4150 status
= nfs4_check_delegmode(deleg
, flags
);
4152 nfs4_put_stid(&deleg
->dl_stid
);
4157 if (!nfsd4_is_deleg_cur(open
))
4161 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
4165 static inline int nfs4_access_to_access(u32 nfs4_access
)
4169 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
4170 flags
|= NFSD_MAY_READ
;
4171 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
4172 flags
|= NFSD_MAY_WRITE
;
4176 static inline __be32
4177 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
4178 struct nfsd4_open
*open
)
4180 struct iattr iattr
= {
4181 .ia_valid
= ATTR_SIZE
,
4184 if (!open
->op_truncate
)
4186 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
4187 return nfserr_inval
;
4188 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
4191 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
4192 struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
,
4193 struct nfsd4_open
*open
)
4195 struct file
*filp
= NULL
;
4197 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
4198 int access
= nfs4_access_to_access(open
->op_share_access
);
4199 unsigned char old_access_bmap
, old_deny_bmap
;
4201 spin_lock(&fp
->fi_lock
);
4204 * Are we trying to set a deny mode that would conflict with
4207 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
4208 if (status
!= nfs_ok
) {
4209 spin_unlock(&fp
->fi_lock
);
4213 /* set access to the file */
4214 status
= nfs4_file_get_access(fp
, open
->op_share_access
);
4215 if (status
!= nfs_ok
) {
4216 spin_unlock(&fp
->fi_lock
);
4220 /* Set access bits in stateid */
4221 old_access_bmap
= stp
->st_access_bmap
;
4222 set_access(open
->op_share_access
, stp
);
4224 /* Set new deny mask */
4225 old_deny_bmap
= stp
->st_deny_bmap
;
4226 set_deny(open
->op_share_deny
, stp
);
4227 fp
->fi_share_deny
|= (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
4229 if (!fp
->fi_fds
[oflag
]) {
4230 spin_unlock(&fp
->fi_lock
);
4231 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
, &filp
);
4233 goto out_put_access
;
4234 spin_lock(&fp
->fi_lock
);
4235 if (!fp
->fi_fds
[oflag
]) {
4236 fp
->fi_fds
[oflag
] = filp
;
4240 spin_unlock(&fp
->fi_lock
);
4244 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
4246 goto out_put_access
;
4250 stp
->st_access_bmap
= old_access_bmap
;
4251 nfs4_file_put_access(fp
, open
->op_share_access
);
4252 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap
), stp
);
4257 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
)
4260 unsigned char old_deny_bmap
= stp
->st_deny_bmap
;
4262 if (!test_access(open
->op_share_access
, stp
))
4263 return nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, stp
, open
);
4265 /* test and set deny mode */
4266 spin_lock(&fp
->fi_lock
);
4267 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
4268 if (status
== nfs_ok
) {
4269 set_deny(open
->op_share_deny
, stp
);
4270 fp
->fi_share_deny
|=
4271 (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
4273 spin_unlock(&fp
->fi_lock
);
4275 if (status
!= nfs_ok
)
4278 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
4279 if (status
!= nfs_ok
)
4280 reset_union_bmap_deny(old_deny_bmap
, stp
);
4284 /* Should we give out recallable state?: */
4285 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
4287 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
4290 * In the sessions case, since we don't have to establish a
4291 * separate connection for callbacks, we assume it's OK
4292 * until we hear otherwise:
4294 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
4297 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
,
4300 struct file_lock
*fl
;
4302 fl
= locks_alloc_lock();
4305 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
4306 fl
->fl_flags
= FL_DELEG
;
4307 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
4308 fl
->fl_end
= OFFSET_MAX
;
4309 fl
->fl_owner
= (fl_owner_t
)dp
;
4310 fl
->fl_pid
= current
->tgid
;
4311 fl
->fl_file
= dp
->dl_stid
.sc_file
->fi_deleg_file
;
4315 static struct nfs4_delegation
*
4316 nfs4_set_delegation(struct nfs4_client
*clp
, struct svc_fh
*fh
,
4317 struct nfs4_file
*fp
, struct nfs4_clnt_odstate
*odstate
)
4320 struct nfs4_delegation
*dp
;
4322 struct file_lock
*fl
;
4325 * The fi_had_conflict and nfs_get_existing_delegation checks
4326 * here are just optimizations; we'll need to recheck them at
4329 if (fp
->fi_had_conflict
)
4330 return ERR_PTR(-EAGAIN
);
4332 filp
= find_readable_file(fp
);
4334 /* We should always have a readable file here */
4336 return ERR_PTR(-EBADF
);
4338 spin_lock(&state_lock
);
4339 spin_lock(&fp
->fi_lock
);
4340 if (nfs4_delegation_exists(clp
, fp
))
4342 else if (!fp
->fi_deleg_file
) {
4343 fp
->fi_deleg_file
= filp
;
4344 /* increment early to prevent fi_deleg_file from being
4346 fp
->fi_delegees
= 1;
4350 spin_unlock(&fp
->fi_lock
);
4351 spin_unlock(&state_lock
);
4355 return ERR_PTR(status
);
4358 dp
= alloc_init_deleg(clp
, fp
, fh
, odstate
);
4362 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
4366 status
= vfs_setlease(fp
->fi_deleg_file
, fl
->fl_type
, &fl
, NULL
);
4368 locks_free_lock(fl
);
4370 goto out_clnt_odstate
;
4372 spin_lock(&state_lock
);
4373 spin_lock(&fp
->fi_lock
);
4374 if (fp
->fi_had_conflict
)
4377 status
= hash_delegation_locked(dp
, fp
);
4378 spin_unlock(&fp
->fi_lock
);
4379 spin_unlock(&state_lock
);
4382 destroy_unhashed_deleg(dp
);
4385 put_clnt_odstate(dp
->dl_clnt_odstate
);
4387 nfs4_put_stid(&dp
->dl_stid
);
4390 return ERR_PTR(status
);
4393 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
4395 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4396 if (status
== -EAGAIN
)
4397 open
->op_why_no_deleg
= WND4_CONTENTION
;
4399 open
->op_why_no_deleg
= WND4_RESOURCE
;
4400 switch (open
->op_deleg_want
) {
4401 case NFS4_SHARE_WANT_READ_DELEG
:
4402 case NFS4_SHARE_WANT_WRITE_DELEG
:
4403 case NFS4_SHARE_WANT_ANY_DELEG
:
4405 case NFS4_SHARE_WANT_CANCEL
:
4406 open
->op_why_no_deleg
= WND4_CANCELLED
;
4408 case NFS4_SHARE_WANT_NO_DELEG
:
4415 * Attempt to hand out a delegation.
4417 * Note we don't support write delegations, and won't until the vfs has
4418 * proper support for them.
4421 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
,
4422 struct nfs4_ol_stateid
*stp
)
4424 struct nfs4_delegation
*dp
;
4425 struct nfs4_openowner
*oo
= openowner(stp
->st_stateowner
);
4426 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
4430 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
4431 open
->op_recall
= 0;
4432 switch (open
->op_claim_type
) {
4433 case NFS4_OPEN_CLAIM_PREVIOUS
:
4435 open
->op_recall
= 1;
4436 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
4439 case NFS4_OPEN_CLAIM_NULL
:
4440 case NFS4_OPEN_CLAIM_FH
:
4442 * Let's not give out any delegations till everyone's
4443 * had the chance to reclaim theirs, *and* until
4444 * NLM locks have all been reclaimed:
4446 if (locks_in_grace(clp
->net
))
4448 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
4451 * Also, if the file was opened for write or
4452 * create, there's a good chance the client's
4453 * about to write to it, resulting in an
4454 * immediate recall (since we don't support
4455 * write delegations):
4457 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
4459 if (open
->op_create
== NFS4_OPEN_CREATE
)
4465 dp
= nfs4_set_delegation(clp
, fh
, stp
->st_stid
.sc_file
, stp
->st_clnt_odstate
);
4469 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
4471 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
4472 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
4473 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
4474 nfs4_put_stid(&dp
->dl_stid
);
4477 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
4478 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
4479 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
4480 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
4481 open
->op_recall
= 1;
4484 /* 4.1 client asking for a delegation? */
4485 if (open
->op_deleg_want
)
4486 nfsd4_open_deleg_none_ext(open
, status
);
4490 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
4491 struct nfs4_delegation
*dp
)
4493 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
4494 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4495 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4496 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
4497 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
4498 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4499 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4500 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
4502 /* Otherwise the client must be confused wanting a delegation
4503 * it already has, therefore we don't return
4504 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4509 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
4511 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
4512 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
4513 struct nfs4_file
*fp
= NULL
;
4514 struct nfs4_ol_stateid
*stp
= NULL
;
4515 struct nfs4_delegation
*dp
= NULL
;
4517 bool new_stp
= false;
4520 * Lookup file; if found, lookup stateid and check open request,
4521 * and check for delegations in the process of being recalled.
4522 * If not found, create the nfs4_file struct
4524 fp
= find_or_add_file(open
->op_file
, ¤t_fh
->fh_handle
);
4525 if (fp
!= open
->op_file
) {
4526 status
= nfs4_check_deleg(cl
, open
, &dp
);
4529 stp
= nfsd4_find_and_lock_existing_open(fp
, open
);
4531 open
->op_file
= NULL
;
4532 status
= nfserr_bad_stateid
;
4533 if (nfsd4_is_deleg_cur(open
))
4538 stp
= init_open_stateid(fp
, open
);
4544 * OPEN the file, or upgrade an existing OPEN.
4545 * If truncate fails, the OPEN fails.
4547 * stp is already locked.
4550 /* Stateid was found, this is an OPEN upgrade */
4551 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
4553 mutex_unlock(&stp
->st_mutex
);
4557 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, stp
, open
);
4559 stp
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4560 release_open_stateid(stp
);
4561 mutex_unlock(&stp
->st_mutex
);
4565 stp
->st_clnt_odstate
= find_or_hash_clnt_odstate(fp
,
4567 if (stp
->st_clnt_odstate
== open
->op_odstate
)
4568 open
->op_odstate
= NULL
;
4571 nfs4_inc_and_copy_stateid(&open
->op_stateid
, &stp
->st_stid
);
4572 mutex_unlock(&stp
->st_mutex
);
4574 if (nfsd4_has_session(&resp
->cstate
)) {
4575 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
4576 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4577 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
4583 * Attempt to hand out a delegation. No error return, because the
4584 * OPEN succeeds even if we fail.
4586 nfs4_open_delegation(current_fh
, open
, stp
);
4590 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
4591 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4593 /* 4.1 client trying to upgrade/downgrade delegation? */
4594 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
4595 open
->op_deleg_want
)
4596 nfsd4_deleg_xgrade_none_ext(open
, dp
);
4600 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
4601 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
4603 * To finish the open response, we just need to set the rflags.
4605 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
4606 if (nfsd4_has_session(&resp
->cstate
))
4607 open
->op_rflags
|= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK
;
4608 else if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
))
4609 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
4612 nfs4_put_stid(&dp
->dl_stid
);
4614 nfs4_put_stid(&stp
->st_stid
);
4619 void nfsd4_cleanup_open_state(struct nfsd4_compound_state
*cstate
,
4620 struct nfsd4_open
*open
)
4622 if (open
->op_openowner
) {
4623 struct nfs4_stateowner
*so
= &open
->op_openowner
->oo_owner
;
4625 nfsd4_cstate_assign_replay(cstate
, so
);
4626 nfs4_put_stateowner(so
);
4629 kmem_cache_free(file_slab
, open
->op_file
);
4631 nfs4_put_stid(&open
->op_stp
->st_stid
);
4632 if (open
->op_odstate
)
4633 kmem_cache_free(odstate_slab
, open
->op_odstate
);
4637 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4638 union nfsd4_op_u
*u
)
4640 clientid_t
*clid
= &u
->renew
;
4641 struct nfs4_client
*clp
;
4643 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4645 dprintk("process_renew(%08x/%08x): starting\n",
4646 clid
->cl_boot
, clid
->cl_id
);
4647 status
= lookup_clientid(clid
, cstate
, nn
);
4651 status
= nfserr_cb_path_down
;
4652 if (!list_empty(&clp
->cl_delegations
)
4653 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
4661 nfsd4_end_grace(struct nfsd_net
*nn
)
4663 /* do nothing if grace period already ended */
4664 if (nn
->grace_ended
)
4667 dprintk("NFSD: end of grace period\n");
4668 nn
->grace_ended
= true;
4670 * If the server goes down again right now, an NFSv4
4671 * client will still be allowed to reclaim after it comes back up,
4672 * even if it hasn't yet had a chance to reclaim state this time.
4675 nfsd4_record_grace_done(nn
);
4677 * At this point, NFSv4 clients can still reclaim. But if the
4678 * server crashes, any that have not yet reclaimed will be out
4679 * of luck on the next boot.
4681 * (NFSv4.1+ clients are considered to have reclaimed once they
4682 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4683 * have reclaimed after their first OPEN.)
4685 locks_end_grace(&nn
->nfsd4_manager
);
4687 * At this point, and once lockd and/or any other containers
4688 * exit their grace period, further reclaims will fail and
4689 * regular locking can resume.
4694 nfs4_laundromat(struct nfsd_net
*nn
)
4696 struct nfs4_client
*clp
;
4697 struct nfs4_openowner
*oo
;
4698 struct nfs4_delegation
*dp
;
4699 struct nfs4_ol_stateid
*stp
;
4700 struct nfsd4_blocked_lock
*nbl
;
4701 struct list_head
*pos
, *next
, reaplist
;
4702 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
4703 time_t t
, new_timeo
= nn
->nfsd4_lease
;
4705 dprintk("NFSD: laundromat service - starting\n");
4706 nfsd4_end_grace(nn
);
4707 INIT_LIST_HEAD(&reaplist
);
4708 spin_lock(&nn
->client_lock
);
4709 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
4710 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4711 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
4712 t
= clp
->cl_time
- cutoff
;
4713 new_timeo
= min(new_timeo
, t
);
4716 if (mark_client_expired_locked(clp
)) {
4717 dprintk("NFSD: client in use (clientid %08x)\n",
4718 clp
->cl_clientid
.cl_id
);
4721 list_add(&clp
->cl_lru
, &reaplist
);
4723 spin_unlock(&nn
->client_lock
);
4724 list_for_each_safe(pos
, next
, &reaplist
) {
4725 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4726 dprintk("NFSD: purging unused client (clientid %08x)\n",
4727 clp
->cl_clientid
.cl_id
);
4728 list_del_init(&clp
->cl_lru
);
4731 spin_lock(&state_lock
);
4732 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4733 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4734 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
4735 t
= dp
->dl_time
- cutoff
;
4736 new_timeo
= min(new_timeo
, t
);
4739 WARN_ON(!unhash_delegation_locked(dp
));
4740 list_add(&dp
->dl_recall_lru
, &reaplist
);
4742 spin_unlock(&state_lock
);
4743 while (!list_empty(&reaplist
)) {
4744 dp
= list_first_entry(&reaplist
, struct nfs4_delegation
,
4746 list_del_init(&dp
->dl_recall_lru
);
4747 revoke_delegation(dp
);
4750 spin_lock(&nn
->client_lock
);
4751 while (!list_empty(&nn
->close_lru
)) {
4752 oo
= list_first_entry(&nn
->close_lru
, struct nfs4_openowner
,
4754 if (time_after((unsigned long)oo
->oo_time
,
4755 (unsigned long)cutoff
)) {
4756 t
= oo
->oo_time
- cutoff
;
4757 new_timeo
= min(new_timeo
, t
);
4760 list_del_init(&oo
->oo_close_lru
);
4761 stp
= oo
->oo_last_closed_stid
;
4762 oo
->oo_last_closed_stid
= NULL
;
4763 spin_unlock(&nn
->client_lock
);
4764 nfs4_put_stid(&stp
->st_stid
);
4765 spin_lock(&nn
->client_lock
);
4767 spin_unlock(&nn
->client_lock
);
4770 * It's possible for a client to try and acquire an already held lock
4771 * that is being held for a long time, and then lose interest in it.
4772 * So, we clean out any un-revisited request after a lease period
4773 * under the assumption that the client is no longer interested.
4775 * RFC5661, sec. 9.6 states that the client must not rely on getting
4776 * notifications and must continue to poll for locks, even when the
4777 * server supports them. Thus this shouldn't lead to clients blocking
4778 * indefinitely once the lock does become free.
4780 BUG_ON(!list_empty(&reaplist
));
4781 spin_lock(&nn
->blocked_locks_lock
);
4782 while (!list_empty(&nn
->blocked_locks_lru
)) {
4783 nbl
= list_first_entry(&nn
->blocked_locks_lru
,
4784 struct nfsd4_blocked_lock
, nbl_lru
);
4785 if (time_after((unsigned long)nbl
->nbl_time
,
4786 (unsigned long)cutoff
)) {
4787 t
= nbl
->nbl_time
- cutoff
;
4788 new_timeo
= min(new_timeo
, t
);
4791 list_move(&nbl
->nbl_lru
, &reaplist
);
4792 list_del_init(&nbl
->nbl_list
);
4794 spin_unlock(&nn
->blocked_locks_lock
);
4796 while (!list_empty(&reaplist
)) {
4797 nbl
= list_first_entry(&reaplist
,
4798 struct nfsd4_blocked_lock
, nbl_lru
);
4799 list_del_init(&nbl
->nbl_lru
);
4800 posix_unblock_lock(&nbl
->nbl_lock
);
4801 free_blocked_lock(nbl
);
4804 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
4808 static struct workqueue_struct
*laundry_wq
;
4809 static void laundromat_main(struct work_struct
*);
4812 laundromat_main(struct work_struct
*laundry
)
4815 struct delayed_work
*dwork
= to_delayed_work(laundry
);
4816 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
4819 t
= nfs4_laundromat(nn
);
4820 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
4821 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
4824 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stid
*stp
)
4826 if (!fh_match(&fhp
->fh_handle
, &stp
->sc_file
->fi_fhandle
))
4827 return nfserr_bad_stateid
;
4832 access_permit_read(struct nfs4_ol_stateid
*stp
)
4834 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
4835 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
4836 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
4840 access_permit_write(struct nfs4_ol_stateid
*stp
)
4842 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
4843 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
4847 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
4849 __be32 status
= nfserr_openmode
;
4851 /* For lock stateid's, we test the parent open, not the lock: */
4852 if (stp
->st_openstp
)
4853 stp
= stp
->st_openstp
;
4854 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
4856 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
4863 static inline __be32
4864 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
4866 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
4868 else if (opens_in_grace(net
)) {
4869 /* Answer in remaining cases depends on existence of
4870 * conflicting state; so we must wait out the grace period. */
4871 return nfserr_grace
;
4872 } else if (flags
& WR_STATE
)
4873 return nfs4_share_conflict(current_fh
,
4874 NFS4_SHARE_DENY_WRITE
);
4875 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4876 return nfs4_share_conflict(current_fh
,
4877 NFS4_SHARE_DENY_READ
);
4881 * Allow READ/WRITE during grace period on recovered state only for files
4882 * that are not able to provide mandatory locking.
4885 grace_disallows_io(struct net
*net
, struct inode
*inode
)
4887 return opens_in_grace(net
) && mandatory_lock(inode
);
4890 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
4893 * When sessions are used the stateid generation number is ignored
4896 if (has_session
&& in
->si_generation
== 0)
4899 if (in
->si_generation
== ref
->si_generation
)
4902 /* If the client sends us a stateid from the future, it's buggy: */
4903 if (nfsd4_stateid_generation_after(in
, ref
))
4904 return nfserr_bad_stateid
;
4906 * However, we could see a stateid from the past, even from a
4907 * non-buggy client. For example, if the client sends a lock
4908 * while some IO is outstanding, the lock may bump si_generation
4909 * while the IO is still in flight. The client could avoid that
4910 * situation by waiting for responses on all the IO requests,
4911 * but better performance may result in retrying IO that
4912 * receives an old_stateid error if requests are rarely
4913 * reordered in flight:
4915 return nfserr_old_stateid
;
4918 static __be32
nfsd4_stid_check_stateid_generation(stateid_t
*in
, struct nfs4_stid
*s
, bool has_session
)
4922 spin_lock(&s
->sc_lock
);
4923 ret
= nfsd4_verify_open_stid(s
);
4925 ret
= check_stateid_generation(in
, &s
->sc_stateid
, has_session
);
4926 spin_unlock(&s
->sc_lock
);
4930 static __be32
nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid
*ols
)
4932 if (ols
->st_stateowner
->so_is_open_owner
&&
4933 !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
4934 return nfserr_bad_stateid
;
4938 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
4940 struct nfs4_stid
*s
;
4941 __be32 status
= nfserr_bad_stateid
;
4943 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
) ||
4944 CLOSE_STATEID(stateid
))
4946 /* Client debugging aid. */
4947 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
4948 char addr_str
[INET6_ADDRSTRLEN
];
4949 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
4951 pr_warn_ratelimited("NFSD: client %s testing state ID "
4952 "with incorrect client ID\n", addr_str
);
4955 spin_lock(&cl
->cl_lock
);
4956 s
= find_stateid_locked(cl
, stateid
);
4959 status
= nfsd4_stid_check_stateid_generation(stateid
, s
, 1);
4962 switch (s
->sc_type
) {
4963 case NFS4_DELEG_STID
:
4966 case NFS4_REVOKED_DELEG_STID
:
4967 status
= nfserr_deleg_revoked
;
4969 case NFS4_OPEN_STID
:
4970 case NFS4_LOCK_STID
:
4971 status
= nfsd4_check_openowner_confirmed(openlockstateid(s
));
4974 printk("unknown stateid type %x\n", s
->sc_type
);
4976 case NFS4_CLOSED_STID
:
4977 case NFS4_CLOSED_DELEG_STID
:
4978 status
= nfserr_bad_stateid
;
4981 spin_unlock(&cl
->cl_lock
);
4986 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
4987 stateid_t
*stateid
, unsigned char typemask
,
4988 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
4991 bool return_revoked
= false;
4994 * only return revoked delegations if explicitly asked.
4995 * otherwise we report revoked or bad_stateid status.
4997 if (typemask
& NFS4_REVOKED_DELEG_STID
)
4998 return_revoked
= true;
4999 else if (typemask
& NFS4_DELEG_STID
)
5000 typemask
|= NFS4_REVOKED_DELEG_STID
;
5002 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
) ||
5003 CLOSE_STATEID(stateid
))
5004 return nfserr_bad_stateid
;
5005 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
5006 if (status
== nfserr_stale_clientid
) {
5007 if (cstate
->session
)
5008 return nfserr_bad_stateid
;
5009 return nfserr_stale_stateid
;
5013 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
5015 return nfserr_bad_stateid
;
5016 if (((*s
)->sc_type
== NFS4_REVOKED_DELEG_STID
) && !return_revoked
) {
5018 if (cstate
->minorversion
)
5019 return nfserr_deleg_revoked
;
5020 return nfserr_bad_stateid
;
5025 static struct file
*
5026 nfs4_find_file(struct nfs4_stid
*s
, int flags
)
5031 switch (s
->sc_type
) {
5032 case NFS4_DELEG_STID
:
5033 if (WARN_ON_ONCE(!s
->sc_file
->fi_deleg_file
))
5035 return get_file(s
->sc_file
->fi_deleg_file
);
5036 case NFS4_OPEN_STID
:
5037 case NFS4_LOCK_STID
:
5038 if (flags
& RD_STATE
)
5039 return find_readable_file(s
->sc_file
);
5041 return find_writeable_file(s
->sc_file
);
5049 nfs4_check_olstateid(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*ols
, int flags
)
5053 status
= nfsd4_check_openowner_confirmed(ols
);
5056 return nfs4_check_openmode(ols
, flags
);
5060 nfs4_check_file(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct nfs4_stid
*s
,
5061 struct file
**filpp
, bool *tmp_file
, int flags
)
5063 int acc
= (flags
& RD_STATE
) ? NFSD_MAY_READ
: NFSD_MAY_WRITE
;
5067 file
= nfs4_find_file(s
, flags
);
5069 status
= nfsd_permission(rqstp
, fhp
->fh_export
, fhp
->fh_dentry
,
5070 acc
| NFSD_MAY_OWNER_OVERRIDE
);
5078 status
= nfsd_open(rqstp
, fhp
, S_IFREG
, acc
, filpp
);
5090 * Checks for stateid operations
5093 nfs4_preprocess_stateid_op(struct svc_rqst
*rqstp
,
5094 struct nfsd4_compound_state
*cstate
, struct svc_fh
*fhp
,
5095 stateid_t
*stateid
, int flags
, struct file
**filpp
, bool *tmp_file
)
5097 struct inode
*ino
= d_inode(fhp
->fh_dentry
);
5098 struct net
*net
= SVC_NET(rqstp
);
5099 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5100 struct nfs4_stid
*s
= NULL
;
5108 if (grace_disallows_io(net
, ino
))
5109 return nfserr_grace
;
5111 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
5112 status
= check_special_stateids(net
, fhp
, stateid
, flags
);
5116 status
= nfsd4_lookup_stateid(cstate
, stateid
,
5117 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
5121 status
= nfsd4_stid_check_stateid_generation(stateid
, s
,
5122 nfsd4_has_session(cstate
));
5126 switch (s
->sc_type
) {
5127 case NFS4_DELEG_STID
:
5128 status
= nfs4_check_delegmode(delegstateid(s
), flags
);
5130 case NFS4_OPEN_STID
:
5131 case NFS4_LOCK_STID
:
5132 status
= nfs4_check_olstateid(fhp
, openlockstateid(s
), flags
);
5135 status
= nfserr_bad_stateid
;
5140 status
= nfs4_check_fh(fhp
, s
);
5143 if (!status
&& filpp
)
5144 status
= nfs4_check_file(rqstp
, fhp
, s
, filpp
, tmp_file
, flags
);
5152 * Test if the stateid is valid
5155 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5156 union nfsd4_op_u
*u
)
5158 struct nfsd4_test_stateid
*test_stateid
= &u
->test_stateid
;
5159 struct nfsd4_test_stateid_id
*stateid
;
5160 struct nfs4_client
*cl
= cstate
->session
->se_client
;
5162 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
5163 stateid
->ts_id_status
=
5164 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
5170 nfsd4_free_lock_stateid(stateid_t
*stateid
, struct nfs4_stid
*s
)
5172 struct nfs4_ol_stateid
*stp
= openlockstateid(s
);
5175 ret
= nfsd4_lock_ol_stateid(stp
);
5179 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
5183 ret
= nfserr_locks_held
;
5184 if (check_for_locks(stp
->st_stid
.sc_file
,
5185 lockowner(stp
->st_stateowner
)))
5188 release_lock_stateid(stp
);
5192 mutex_unlock(&stp
->st_mutex
);
5199 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5200 union nfsd4_op_u
*u
)
5202 struct nfsd4_free_stateid
*free_stateid
= &u
->free_stateid
;
5203 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
5204 struct nfs4_stid
*s
;
5205 struct nfs4_delegation
*dp
;
5206 struct nfs4_client
*cl
= cstate
->session
->se_client
;
5207 __be32 ret
= nfserr_bad_stateid
;
5209 spin_lock(&cl
->cl_lock
);
5210 s
= find_stateid_locked(cl
, stateid
);
5213 spin_lock(&s
->sc_lock
);
5214 switch (s
->sc_type
) {
5215 case NFS4_DELEG_STID
:
5216 ret
= nfserr_locks_held
;
5218 case NFS4_OPEN_STID
:
5219 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
5222 ret
= nfserr_locks_held
;
5224 case NFS4_LOCK_STID
:
5225 spin_unlock(&s
->sc_lock
);
5226 refcount_inc(&s
->sc_count
);
5227 spin_unlock(&cl
->cl_lock
);
5228 ret
= nfsd4_free_lock_stateid(stateid
, s
);
5230 case NFS4_REVOKED_DELEG_STID
:
5231 spin_unlock(&s
->sc_lock
);
5232 dp
= delegstateid(s
);
5233 list_del_init(&dp
->dl_recall_lru
);
5234 spin_unlock(&cl
->cl_lock
);
5238 /* Default falls through and returns nfserr_bad_stateid */
5240 spin_unlock(&s
->sc_lock
);
5242 spin_unlock(&cl
->cl_lock
);
5250 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
5251 RD_STATE
: WR_STATE
;
5254 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
5256 struct svc_fh
*current_fh
= &cstate
->current_fh
;
5257 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
5260 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
5263 status
= nfsd4_lock_ol_stateid(stp
);
5264 if (status
!= nfs_ok
)
5266 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
5267 if (status
== nfs_ok
)
5268 status
= nfs4_check_fh(current_fh
, &stp
->st_stid
);
5269 if (status
!= nfs_ok
)
5270 mutex_unlock(&stp
->st_mutex
);
5275 * Checks for sequence id mutating operations.
5278 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
5279 stateid_t
*stateid
, char typemask
,
5280 struct nfs4_ol_stateid
**stpp
,
5281 struct nfsd_net
*nn
)
5284 struct nfs4_stid
*s
;
5285 struct nfs4_ol_stateid
*stp
= NULL
;
5287 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
5288 seqid
, STATEID_VAL(stateid
));
5291 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
5294 stp
= openlockstateid(s
);
5295 nfsd4_cstate_assign_replay(cstate
, stp
->st_stateowner
);
5297 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
5301 nfs4_put_stid(&stp
->st_stid
);
5305 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
5306 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
5309 struct nfs4_openowner
*oo
;
5310 struct nfs4_ol_stateid
*stp
;
5312 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
5313 NFS4_OPEN_STID
, &stp
, nn
);
5316 oo
= openowner(stp
->st_stateowner
);
5317 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
5318 mutex_unlock(&stp
->st_mutex
);
5319 nfs4_put_stid(&stp
->st_stid
);
5320 return nfserr_bad_stateid
;
5327 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5328 union nfsd4_op_u
*u
)
5330 struct nfsd4_open_confirm
*oc
= &u
->open_confirm
;
5332 struct nfs4_openowner
*oo
;
5333 struct nfs4_ol_stateid
*stp
;
5334 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5336 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5337 cstate
->current_fh
.fh_dentry
);
5339 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
5343 status
= nfs4_preprocess_seqid_op(cstate
,
5344 oc
->oc_seqid
, &oc
->oc_req_stateid
,
5345 NFS4_OPEN_STID
, &stp
, nn
);
5348 oo
= openowner(stp
->st_stateowner
);
5349 status
= nfserr_bad_stateid
;
5350 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
) {
5351 mutex_unlock(&stp
->st_mutex
);
5354 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
5355 nfs4_inc_and_copy_stateid(&oc
->oc_resp_stateid
, &stp
->st_stid
);
5356 mutex_unlock(&stp
->st_mutex
);
5357 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
5358 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
5360 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
5363 nfs4_put_stid(&stp
->st_stid
);
5365 nfsd4_bump_seqid(cstate
, status
);
5369 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
5371 if (!test_access(access
, stp
))
5373 nfs4_file_put_access(stp
->st_stid
.sc_file
, access
);
5374 clear_access(access
, stp
);
5377 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
5379 switch (to_access
) {
5380 case NFS4_SHARE_ACCESS_READ
:
5381 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
5382 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
5384 case NFS4_SHARE_ACCESS_WRITE
:
5385 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
5386 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
5388 case NFS4_SHARE_ACCESS_BOTH
:
5396 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
5397 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
5399 struct nfsd4_open_downgrade
*od
= &u
->open_downgrade
;
5401 struct nfs4_ol_stateid
*stp
;
5402 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5404 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5405 cstate
->current_fh
.fh_dentry
);
5407 /* We don't yet support WANT bits: */
5408 if (od
->od_deleg_want
)
5409 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
5412 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
5413 &od
->od_stateid
, &stp
, nn
);
5416 status
= nfserr_inval
;
5417 if (!test_access(od
->od_share_access
, stp
)) {
5418 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
5419 stp
->st_access_bmap
, od
->od_share_access
);
5422 if (!test_deny(od
->od_share_deny
, stp
)) {
5423 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
5424 stp
->st_deny_bmap
, od
->od_share_deny
);
5427 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
5428 reset_union_bmap_deny(od
->od_share_deny
, stp
);
5429 nfs4_inc_and_copy_stateid(&od
->od_stateid
, &stp
->st_stid
);
5432 mutex_unlock(&stp
->st_mutex
);
5433 nfs4_put_stid(&stp
->st_stid
);
5435 nfsd4_bump_seqid(cstate
, status
);
5439 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
5441 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
5443 LIST_HEAD(reaplist
);
5445 spin_lock(&clp
->cl_lock
);
5446 unhashed
= unhash_open_stateid(s
, &reaplist
);
5448 if (clp
->cl_minorversion
) {
5450 put_ol_stateid_locked(s
, &reaplist
);
5451 spin_unlock(&clp
->cl_lock
);
5452 free_ol_stateid_reaplist(&reaplist
);
5454 spin_unlock(&clp
->cl_lock
);
5455 free_ol_stateid_reaplist(&reaplist
);
5457 move_to_close_lru(s
, clp
->net
);
5462 * nfs4_unlock_state() called after encode
5465 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5466 union nfsd4_op_u
*u
)
5468 struct nfsd4_close
*close
= &u
->close
;
5470 struct nfs4_ol_stateid
*stp
;
5471 struct net
*net
= SVC_NET(rqstp
);
5472 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5474 dprintk("NFSD: nfsd4_close on file %pd\n",
5475 cstate
->current_fh
.fh_dentry
);
5477 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
5479 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
5481 nfsd4_bump_seqid(cstate
, status
);
5485 stp
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
5488 * Technically we don't _really_ have to increment or copy it, since
5489 * it should just be gone after this operation and we clobber the
5490 * copied value below, but we continue to do so here just to ensure
5491 * that racing ops see that there was a state change.
5493 nfs4_inc_and_copy_stateid(&close
->cl_stateid
, &stp
->st_stid
);
5495 nfsd4_close_open_stateid(stp
);
5496 mutex_unlock(&stp
->st_mutex
);
5498 /* v4.1+ suggests that we send a special stateid in here, since the
5499 * clients should just ignore this anyway. Since this is not useful
5500 * for v4.0 clients either, we set it to the special close_stateid
5503 * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5
5505 memcpy(&close
->cl_stateid
, &close_stateid
, sizeof(close
->cl_stateid
));
5507 /* put reference from nfs4_preprocess_seqid_op */
5508 nfs4_put_stid(&stp
->st_stid
);
5514 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5515 union nfsd4_op_u
*u
)
5517 struct nfsd4_delegreturn
*dr
= &u
->delegreturn
;
5518 struct nfs4_delegation
*dp
;
5519 stateid_t
*stateid
= &dr
->dr_stateid
;
5520 struct nfs4_stid
*s
;
5522 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5524 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5527 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
5530 dp
= delegstateid(s
);
5531 status
= nfsd4_stid_check_stateid_generation(stateid
, &dp
->dl_stid
, nfsd4_has_session(cstate
));
5535 destroy_delegation(dp
);
5537 nfs4_put_stid(&dp
->dl_stid
);
5543 end_offset(u64 start
, u64 len
)
5548 return end
>= start
? end
: NFS4_MAX_UINT64
;
5551 /* last octet in a range */
5553 last_byte_offset(u64 start
, u64 len
)
5559 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
5563 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
5564 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
5565 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
5566 * locking, this prevents us from being completely protocol-compliant. The
5567 * real solution to this problem is to start using unsigned file offsets in
5568 * the VFS, but this is a very deep change!
5571 nfs4_transform_lock_offset(struct file_lock
*lock
)
5573 if (lock
->fl_start
< 0)
5574 lock
->fl_start
= OFFSET_MAX
;
5575 if (lock
->fl_end
< 0)
5576 lock
->fl_end
= OFFSET_MAX
;
5580 nfsd4_fl_get_owner(fl_owner_t owner
)
5582 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)owner
;
5584 nfs4_get_stateowner(&lo
->lo_owner
);
5589 nfsd4_fl_put_owner(fl_owner_t owner
)
5591 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)owner
;
5594 nfs4_put_stateowner(&lo
->lo_owner
);
5598 nfsd4_lm_notify(struct file_lock
*fl
)
5600 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)fl
->fl_owner
;
5601 struct net
*net
= lo
->lo_owner
.so_client
->net
;
5602 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5603 struct nfsd4_blocked_lock
*nbl
= container_of(fl
,
5604 struct nfsd4_blocked_lock
, nbl_lock
);
5607 /* An empty list means that something else is going to be using it */
5608 spin_lock(&nn
->blocked_locks_lock
);
5609 if (!list_empty(&nbl
->nbl_list
)) {
5610 list_del_init(&nbl
->nbl_list
);
5611 list_del_init(&nbl
->nbl_lru
);
5614 spin_unlock(&nn
->blocked_locks_lock
);
5617 nfsd4_run_cb(&nbl
->nbl_cb
);
5620 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
5621 .lm_notify
= nfsd4_lm_notify
,
5622 .lm_get_owner
= nfsd4_fl_get_owner
,
5623 .lm_put_owner
= nfsd4_fl_put_owner
,
5627 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
5629 struct nfs4_lockowner
*lo
;
5631 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
5632 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
5633 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
5634 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
5635 if (!deny
->ld_owner
.data
)
5636 /* We just don't care that much */
5638 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
5639 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
5642 deny
->ld_owner
.len
= 0;
5643 deny
->ld_owner
.data
= NULL
;
5644 deny
->ld_clientid
.cl_boot
= 0;
5645 deny
->ld_clientid
.cl_id
= 0;
5647 deny
->ld_start
= fl
->fl_start
;
5648 deny
->ld_length
= NFS4_MAX_UINT64
;
5649 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
5650 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
5651 deny
->ld_type
= NFS4_READ_LT
;
5652 if (fl
->fl_type
!= F_RDLCK
)
5653 deny
->ld_type
= NFS4_WRITE_LT
;
5656 static struct nfs4_lockowner
*
5657 find_lockowner_str_locked(struct nfs4_client
*clp
, struct xdr_netobj
*owner
)
5659 unsigned int strhashval
= ownerstr_hashval(owner
);
5660 struct nfs4_stateowner
*so
;
5662 lockdep_assert_held(&clp
->cl_lock
);
5664 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[strhashval
],
5666 if (so
->so_is_open_owner
)
5668 if (same_owner_str(so
, owner
))
5669 return lockowner(nfs4_get_stateowner(so
));
5674 static struct nfs4_lockowner
*
5675 find_lockowner_str(struct nfs4_client
*clp
, struct xdr_netobj
*owner
)
5677 struct nfs4_lockowner
*lo
;
5679 spin_lock(&clp
->cl_lock
);
5680 lo
= find_lockowner_str_locked(clp
, owner
);
5681 spin_unlock(&clp
->cl_lock
);
5685 static void nfs4_unhash_lockowner(struct nfs4_stateowner
*sop
)
5687 unhash_lockowner_locked(lockowner(sop
));
5690 static void nfs4_free_lockowner(struct nfs4_stateowner
*sop
)
5692 struct nfs4_lockowner
*lo
= lockowner(sop
);
5694 kmem_cache_free(lockowner_slab
, lo
);
5697 static const struct nfs4_stateowner_operations lockowner_ops
= {
5698 .so_unhash
= nfs4_unhash_lockowner
,
5699 .so_free
= nfs4_free_lockowner
,
5703 * Alloc a lock owner structure.
5704 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
5707 * strhashval = ownerstr_hashval
5709 static struct nfs4_lockowner
*
5710 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
,
5711 struct nfs4_ol_stateid
*open_stp
,
5712 struct nfsd4_lock
*lock
)
5714 struct nfs4_lockowner
*lo
, *ret
;
5716 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
5719 INIT_LIST_HEAD(&lo
->lo_blocked
);
5720 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
5721 lo
->lo_owner
.so_is_open_owner
= 0;
5722 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
;
5723 lo
->lo_owner
.so_ops
= &lockowner_ops
;
5724 spin_lock(&clp
->cl_lock
);
5725 ret
= find_lockowner_str_locked(clp
, &lock
->lk_new_owner
);
5727 list_add(&lo
->lo_owner
.so_strhash
,
5728 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
5731 nfs4_free_stateowner(&lo
->lo_owner
);
5733 spin_unlock(&clp
->cl_lock
);
5737 static struct nfs4_ol_stateid
*
5738 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
5740 struct nfs4_ol_stateid
*lst
;
5741 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5743 lockdep_assert_held(&clp
->cl_lock
);
5745 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
5746 if (lst
->st_stid
.sc_type
!= NFS4_LOCK_STID
)
5748 if (lst
->st_stid
.sc_file
== fp
) {
5749 refcount_inc(&lst
->st_stid
.sc_count
);
5756 static struct nfs4_ol_stateid
*
5757 init_lock_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_lockowner
*lo
,
5758 struct nfs4_file
*fp
, struct inode
*inode
,
5759 struct nfs4_ol_stateid
*open_stp
)
5761 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5762 struct nfs4_ol_stateid
*retstp
;
5764 mutex_init(&stp
->st_mutex
);
5765 mutex_lock_nested(&stp
->st_mutex
, OPEN_STATEID_MUTEX
);
5767 spin_lock(&clp
->cl_lock
);
5768 spin_lock(&fp
->fi_lock
);
5769 retstp
= find_lock_stateid(lo
, fp
);
5773 refcount_inc(&stp
->st_stid
.sc_count
);
5774 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
5775 stp
->st_stateowner
= nfs4_get_stateowner(&lo
->lo_owner
);
5777 stp
->st_stid
.sc_file
= fp
;
5778 stp
->st_access_bmap
= 0;
5779 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
5780 stp
->st_openstp
= open_stp
;
5781 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
5782 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
5783 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
5785 spin_unlock(&fp
->fi_lock
);
5786 spin_unlock(&clp
->cl_lock
);
5788 if (nfsd4_lock_ol_stateid(retstp
) != nfs_ok
) {
5789 nfs4_put_stid(&retstp
->st_stid
);
5792 /* To keep mutex tracking happy */
5793 mutex_unlock(&stp
->st_mutex
);
5799 static struct nfs4_ol_stateid
*
5800 find_or_create_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fi
,
5801 struct inode
*inode
, struct nfs4_ol_stateid
*ost
,
5804 struct nfs4_stid
*ns
= NULL
;
5805 struct nfs4_ol_stateid
*lst
;
5806 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5807 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
5810 spin_lock(&clp
->cl_lock
);
5811 lst
= find_lock_stateid(lo
, fi
);
5812 spin_unlock(&clp
->cl_lock
);
5814 if (nfsd4_lock_ol_stateid(lst
) == nfs_ok
)
5816 nfs4_put_stid(&lst
->st_stid
);
5818 ns
= nfs4_alloc_stid(clp
, stateid_slab
, nfs4_free_lock_stateid
);
5822 lst
= init_lock_stateid(openlockstateid(ns
), lo
, fi
, inode
, ost
);
5823 if (lst
== openlockstateid(ns
))
5832 check_lock_length(u64 offset
, u64 length
)
5834 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
5835 (length
> ~offset
)));
5838 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
5840 struct nfs4_file
*fp
= lock_stp
->st_stid
.sc_file
;
5842 lockdep_assert_held(&fp
->fi_lock
);
5844 if (test_access(access
, lock_stp
))
5846 __nfs4_file_get_access(fp
, access
);
5847 set_access(access
, lock_stp
);
5851 lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
,
5852 struct nfs4_ol_stateid
*ost
,
5853 struct nfsd4_lock
*lock
,
5854 struct nfs4_ol_stateid
**plst
, bool *new)
5857 struct nfs4_file
*fi
= ost
->st_stid
.sc_file
;
5858 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5859 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
5860 struct inode
*inode
= d_inode(cstate
->current_fh
.fh_dentry
);
5861 struct nfs4_lockowner
*lo
;
5862 struct nfs4_ol_stateid
*lst
;
5863 unsigned int strhashval
;
5865 lo
= find_lockowner_str(cl
, &lock
->lk_new_owner
);
5867 strhashval
= ownerstr_hashval(&lock
->lk_new_owner
);
5868 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
5870 return nfserr_jukebox
;
5872 /* with an existing lockowner, seqids must be the same */
5873 status
= nfserr_bad_seqid
;
5874 if (!cstate
->minorversion
&&
5875 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
5879 lst
= find_or_create_lock_stateid(lo
, fi
, inode
, ost
, new);
5881 status
= nfserr_jukebox
;
5888 nfs4_put_stateowner(&lo
->lo_owner
);
5896 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5897 union nfsd4_op_u
*u
)
5899 struct nfsd4_lock
*lock
= &u
->lock
;
5900 struct nfs4_openowner
*open_sop
= NULL
;
5901 struct nfs4_lockowner
*lock_sop
= NULL
;
5902 struct nfs4_ol_stateid
*lock_stp
= NULL
;
5903 struct nfs4_ol_stateid
*open_stp
= NULL
;
5904 struct nfs4_file
*fp
;
5905 struct file
*filp
= NULL
;
5906 struct nfsd4_blocked_lock
*nbl
= NULL
;
5907 struct file_lock
*file_lock
= NULL
;
5908 struct file_lock
*conflock
= NULL
;
5913 unsigned char fl_type
;
5914 unsigned int fl_flags
= FL_POSIX
;
5915 struct net
*net
= SVC_NET(rqstp
);
5916 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5918 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5919 (long long) lock
->lk_offset
,
5920 (long long) lock
->lk_length
);
5922 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
5923 return nfserr_inval
;
5925 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
5926 S_IFREG
, NFSD_MAY_LOCK
))) {
5927 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5931 if (lock
->lk_is_new
) {
5932 if (nfsd4_has_session(cstate
))
5933 /* See rfc 5661 18.10.3: given clientid is ignored: */
5934 memcpy(&lock
->lk_new_clientid
,
5935 &cstate
->session
->se_client
->cl_clientid
,
5936 sizeof(clientid_t
));
5938 status
= nfserr_stale_clientid
;
5939 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
5942 /* validate and update open stateid and open seqid */
5943 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
5944 lock
->lk_new_open_seqid
,
5945 &lock
->lk_new_open_stateid
,
5949 mutex_unlock(&open_stp
->st_mutex
);
5950 open_sop
= openowner(open_stp
->st_stateowner
);
5951 status
= nfserr_bad_stateid
;
5952 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
5953 &lock
->lk_new_clientid
))
5955 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
5958 status
= nfs4_preprocess_seqid_op(cstate
,
5959 lock
->lk_old_lock_seqid
,
5960 &lock
->lk_old_lock_stateid
,
5961 NFS4_LOCK_STID
, &lock_stp
, nn
);
5965 lock_sop
= lockowner(lock_stp
->st_stateowner
);
5967 lkflg
= setlkflg(lock
->lk_type
);
5968 status
= nfs4_check_openmode(lock_stp
, lkflg
);
5972 status
= nfserr_grace
;
5973 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
5975 status
= nfserr_no_grace
;
5976 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
5979 fp
= lock_stp
->st_stid
.sc_file
;
5980 switch (lock
->lk_type
) {
5982 if (nfsd4_has_session(cstate
))
5983 fl_flags
|= FL_SLEEP
;
5986 spin_lock(&fp
->fi_lock
);
5987 filp
= find_readable_file_locked(fp
);
5989 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
5990 spin_unlock(&fp
->fi_lock
);
5993 case NFS4_WRITEW_LT
:
5994 if (nfsd4_has_session(cstate
))
5995 fl_flags
|= FL_SLEEP
;
5998 spin_lock(&fp
->fi_lock
);
5999 filp
= find_writeable_file_locked(fp
);
6001 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
6002 spin_unlock(&fp
->fi_lock
);
6006 status
= nfserr_inval
;
6011 status
= nfserr_openmode
;
6015 nbl
= find_or_allocate_block(lock_sop
, &fp
->fi_fhandle
, nn
);
6017 dprintk("NFSD: %s: unable to allocate block!\n", __func__
);
6018 status
= nfserr_jukebox
;
6022 file_lock
= &nbl
->nbl_lock
;
6023 file_lock
->fl_type
= fl_type
;
6024 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lock_sop
->lo_owner
));
6025 file_lock
->fl_pid
= current
->tgid
;
6026 file_lock
->fl_file
= filp
;
6027 file_lock
->fl_flags
= fl_flags
;
6028 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
6029 file_lock
->fl_start
= lock
->lk_offset
;
6030 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
6031 nfs4_transform_lock_offset(file_lock
);
6033 conflock
= locks_alloc_lock();
6035 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
6036 status
= nfserr_jukebox
;
6040 if (fl_flags
& FL_SLEEP
) {
6041 nbl
->nbl_time
= jiffies
;
6042 spin_lock(&nn
->blocked_locks_lock
);
6043 list_add_tail(&nbl
->nbl_list
, &lock_sop
->lo_blocked
);
6044 list_add_tail(&nbl
->nbl_lru
, &nn
->blocked_locks_lru
);
6045 spin_unlock(&nn
->blocked_locks_lock
);
6048 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
6050 case 0: /* success! */
6051 nfs4_inc_and_copy_stateid(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
);
6054 case FILE_LOCK_DEFERRED
:
6057 case -EAGAIN
: /* conflock holds conflicting lock */
6058 status
= nfserr_denied
;
6059 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
6060 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
6063 status
= nfserr_deadlock
;
6066 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
6067 status
= nfserrno(err
);
6072 /* dequeue it if we queued it before */
6073 if (fl_flags
& FL_SLEEP
) {
6074 spin_lock(&nn
->blocked_locks_lock
);
6075 list_del_init(&nbl
->nbl_list
);
6076 list_del_init(&nbl
->nbl_lru
);
6077 spin_unlock(&nn
->blocked_locks_lock
);
6079 free_blocked_lock(nbl
);
6084 /* Bump seqid manually if the 4.0 replay owner is openowner */
6085 if (cstate
->replay_owner
&&
6086 cstate
->replay_owner
!= &lock_sop
->lo_owner
&&
6087 seqid_mutating_err(ntohl(status
)))
6088 lock_sop
->lo_owner
.so_seqid
++;
6091 * If this is a new, never-before-used stateid, and we are
6092 * returning an error, then just go ahead and release it.
6095 release_lock_stateid(lock_stp
);
6097 mutex_unlock(&lock_stp
->st_mutex
);
6099 nfs4_put_stid(&lock_stp
->st_stid
);
6102 nfs4_put_stid(&open_stp
->st_stid
);
6103 nfsd4_bump_seqid(cstate
, status
);
6105 locks_free_lock(conflock
);
6110 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
6111 * so we do a temporary open here just to get an open file to pass to
6112 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
6115 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
6118 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
6120 err
= nfserrno(vfs_test_lock(file
, lock
));
6130 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
6131 union nfsd4_op_u
*u
)
6133 struct nfsd4_lockt
*lockt
= &u
->lockt
;
6134 struct file_lock
*file_lock
= NULL
;
6135 struct nfs4_lockowner
*lo
= NULL
;
6137 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
6139 if (locks_in_grace(SVC_NET(rqstp
)))
6140 return nfserr_grace
;
6142 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
6143 return nfserr_inval
;
6145 if (!nfsd4_has_session(cstate
)) {
6146 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
6151 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
6154 file_lock
= locks_alloc_lock();
6156 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
6157 status
= nfserr_jukebox
;
6161 switch (lockt
->lt_type
) {
6164 file_lock
->fl_type
= F_RDLCK
;
6167 case NFS4_WRITEW_LT
:
6168 file_lock
->fl_type
= F_WRLCK
;
6171 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
6172 status
= nfserr_inval
;
6176 lo
= find_lockowner_str(cstate
->clp
, &lockt
->lt_owner
);
6178 file_lock
->fl_owner
= (fl_owner_t
)lo
;
6179 file_lock
->fl_pid
= current
->tgid
;
6180 file_lock
->fl_flags
= FL_POSIX
;
6182 file_lock
->fl_start
= lockt
->lt_offset
;
6183 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
6185 nfs4_transform_lock_offset(file_lock
);
6187 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
6191 if (file_lock
->fl_type
!= F_UNLCK
) {
6192 status
= nfserr_denied
;
6193 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
6197 nfs4_put_stateowner(&lo
->lo_owner
);
6199 locks_free_lock(file_lock
);
6204 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
6205 union nfsd4_op_u
*u
)
6207 struct nfsd4_locku
*locku
= &u
->locku
;
6208 struct nfs4_ol_stateid
*stp
;
6209 struct file
*filp
= NULL
;
6210 struct file_lock
*file_lock
= NULL
;
6213 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
6215 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
6216 (long long) locku
->lu_offset
,
6217 (long long) locku
->lu_length
);
6219 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
6220 return nfserr_inval
;
6222 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
6223 &locku
->lu_stateid
, NFS4_LOCK_STID
,
6227 filp
= find_any_file(stp
->st_stid
.sc_file
);
6229 status
= nfserr_lock_range
;
6232 file_lock
= locks_alloc_lock();
6234 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
6235 status
= nfserr_jukebox
;
6239 file_lock
->fl_type
= F_UNLCK
;
6240 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(stp
->st_stateowner
));
6241 file_lock
->fl_pid
= current
->tgid
;
6242 file_lock
->fl_file
= filp
;
6243 file_lock
->fl_flags
= FL_POSIX
;
6244 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
6245 file_lock
->fl_start
= locku
->lu_offset
;
6247 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
6249 nfs4_transform_lock_offset(file_lock
);
6251 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
6253 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
6256 nfs4_inc_and_copy_stateid(&locku
->lu_stateid
, &stp
->st_stid
);
6260 mutex_unlock(&stp
->st_mutex
);
6261 nfs4_put_stid(&stp
->st_stid
);
6263 nfsd4_bump_seqid(cstate
, status
);
6265 locks_free_lock(file_lock
);
6269 status
= nfserrno(err
);
6275 * true: locks held by lockowner
6276 * false: no locks held by lockowner
6279 check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
)
6281 struct file_lock
*fl
;
6283 struct file
*filp
= find_any_file(fp
);
6284 struct inode
*inode
;
6285 struct file_lock_context
*flctx
;
6288 /* Any valid lock stateid should have some sort of access */
6293 inode
= file_inode(filp
);
6294 flctx
= inode
->i_flctx
;
6296 if (flctx
&& !list_empty_careful(&flctx
->flc_posix
)) {
6297 spin_lock(&flctx
->flc_lock
);
6298 list_for_each_entry(fl
, &flctx
->flc_posix
, fl_list
) {
6299 if (fl
->fl_owner
== (fl_owner_t
)lowner
) {
6304 spin_unlock(&flctx
->flc_lock
);
6311 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
6312 struct nfsd4_compound_state
*cstate
,
6313 union nfsd4_op_u
*u
)
6315 struct nfsd4_release_lockowner
*rlockowner
= &u
->release_lockowner
;
6316 clientid_t
*clid
= &rlockowner
->rl_clientid
;
6317 struct nfs4_stateowner
*sop
;
6318 struct nfs4_lockowner
*lo
= NULL
;
6319 struct nfs4_ol_stateid
*stp
;
6320 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
6321 unsigned int hashval
= ownerstr_hashval(owner
);
6323 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
6324 struct nfs4_client
*clp
;
6325 LIST_HEAD (reaplist
);
6327 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
6328 clid
->cl_boot
, clid
->cl_id
);
6330 status
= lookup_clientid(clid
, cstate
, nn
);
6335 /* Find the matching lock stateowner */
6336 spin_lock(&clp
->cl_lock
);
6337 list_for_each_entry(sop
, &clp
->cl_ownerstr_hashtbl
[hashval
],
6340 if (sop
->so_is_open_owner
|| !same_owner_str(sop
, owner
))
6343 /* see if there are still any locks associated with it */
6344 lo
= lockowner(sop
);
6345 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
6346 if (check_for_locks(stp
->st_stid
.sc_file
, lo
)) {
6347 status
= nfserr_locks_held
;
6348 spin_unlock(&clp
->cl_lock
);
6353 nfs4_get_stateowner(sop
);
6357 spin_unlock(&clp
->cl_lock
);
6361 unhash_lockowner_locked(lo
);
6362 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
6363 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
6364 struct nfs4_ol_stateid
,
6366 WARN_ON(!unhash_lock_stateid(stp
));
6367 put_ol_stateid_locked(stp
, &reaplist
);
6369 spin_unlock(&clp
->cl_lock
);
6370 free_ol_stateid_reaplist(&reaplist
);
6371 remove_blocked_locks(lo
);
6372 nfs4_put_stateowner(&lo
->lo_owner
);
6377 static inline struct nfs4_client_reclaim
*
6380 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
6384 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
6386 struct nfs4_client_reclaim
*crp
;
6388 crp
= nfsd4_find_reclaim_client(name
, nn
);
6389 return (crp
&& crp
->cr_clp
);
6393 * failure => all reset bets are off, nfserr_no_grace...
6395 struct nfs4_client_reclaim
*
6396 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
6398 unsigned int strhashval
;
6399 struct nfs4_client_reclaim
*crp
;
6401 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
6402 crp
= alloc_reclaim();
6404 strhashval
= clientstr_hashval(name
);
6405 INIT_LIST_HEAD(&crp
->cr_strhash
);
6406 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
6407 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
6409 nn
->reclaim_str_hashtbl_size
++;
6415 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
6417 list_del(&crp
->cr_strhash
);
6419 nn
->reclaim_str_hashtbl_size
--;
6423 nfs4_release_reclaim(struct nfsd_net
*nn
)
6425 struct nfs4_client_reclaim
*crp
= NULL
;
6428 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6429 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
6430 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
6431 struct nfs4_client_reclaim
, cr_strhash
);
6432 nfs4_remove_reclaim_record(crp
, nn
);
6435 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
6439 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
6440 struct nfs4_client_reclaim
*
6441 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
6443 unsigned int strhashval
;
6444 struct nfs4_client_reclaim
*crp
= NULL
;
6446 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
6448 strhashval
= clientstr_hashval(recdir
);
6449 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
6450 if (same_name(crp
->cr_recdir
, recdir
)) {
6458 * Called from OPEN. Look for clientid in reclaim list.
6461 nfs4_check_open_reclaim(clientid_t
*clid
,
6462 struct nfsd4_compound_state
*cstate
,
6463 struct nfsd_net
*nn
)
6467 /* find clientid in conf_id_hashtbl */
6468 status
= lookup_clientid(clid
, cstate
, nn
);
6470 return nfserr_reclaim_bad
;
6472 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
, &cstate
->clp
->cl_flags
))
6473 return nfserr_no_grace
;
6475 if (nfsd4_client_record_check(cstate
->clp
))
6476 return nfserr_reclaim_bad
;
6481 #ifdef CONFIG_NFSD_FAULT_INJECTION
6483 put_client(struct nfs4_client
*clp
)
6485 atomic_dec(&clp
->cl_refcount
);
6488 static struct nfs4_client
*
6489 nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
6491 struct nfs4_client
*clp
;
6492 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6495 if (!nfsd_netns_ready(nn
))
6498 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6499 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
6506 nfsd_inject_print_clients(void)
6508 struct nfs4_client
*clp
;
6510 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6512 char buf
[INET6_ADDRSTRLEN
];
6514 if (!nfsd_netns_ready(nn
))
6517 spin_lock(&nn
->client_lock
);
6518 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6519 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
6520 pr_info("NFS Client: %s\n", buf
);
6523 spin_unlock(&nn
->client_lock
);
6529 nfsd_inject_forget_client(struct sockaddr_storage
*addr
, size_t addr_size
)
6532 struct nfs4_client
*clp
;
6533 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6536 if (!nfsd_netns_ready(nn
))
6539 spin_lock(&nn
->client_lock
);
6540 clp
= nfsd_find_client(addr
, addr_size
);
6542 if (mark_client_expired_locked(clp
) == nfs_ok
)
6547 spin_unlock(&nn
->client_lock
);
6556 nfsd_inject_forget_clients(u64 max
)
6559 struct nfs4_client
*clp
, *next
;
6560 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6562 LIST_HEAD(reaplist
);
6564 if (!nfsd_netns_ready(nn
))
6567 spin_lock(&nn
->client_lock
);
6568 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6569 if (mark_client_expired_locked(clp
) == nfs_ok
) {
6570 list_add(&clp
->cl_lru
, &reaplist
);
6571 if (max
!= 0 && ++count
>= max
)
6575 spin_unlock(&nn
->client_lock
);
6577 list_for_each_entry_safe(clp
, next
, &reaplist
, cl_lru
)
6583 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
6586 char buf
[INET6_ADDRSTRLEN
];
6587 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
6588 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
6592 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid
*lst
,
6593 struct list_head
*collect
)
6595 struct nfs4_client
*clp
= lst
->st_stid
.sc_client
;
6596 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6602 lockdep_assert_held(&nn
->client_lock
);
6603 atomic_inc(&clp
->cl_refcount
);
6604 list_add(&lst
->st_locks
, collect
);
6607 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
6608 struct list_head
*collect
,
6609 bool (*func
)(struct nfs4_ol_stateid
*))
6611 struct nfs4_openowner
*oop
;
6612 struct nfs4_ol_stateid
*stp
, *st_next
;
6613 struct nfs4_ol_stateid
*lst
, *lst_next
;
6616 spin_lock(&clp
->cl_lock
);
6617 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
6618 list_for_each_entry_safe(stp
, st_next
,
6619 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
6620 list_for_each_entry_safe(lst
, lst_next
,
6621 &stp
->st_locks
, st_locks
) {
6624 nfsd_inject_add_lock_to_list(lst
,
6629 * Despite the fact that these functions deal
6630 * with 64-bit integers for "count", we must
6631 * ensure that it doesn't blow up the
6632 * clp->cl_refcount. Throw a warning if we
6633 * start to approach INT_MAX here.
6635 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6642 spin_unlock(&clp
->cl_lock
);
6648 nfsd_collect_client_locks(struct nfs4_client
*clp
, struct list_head
*collect
,
6651 return nfsd_foreach_client_lock(clp
, max
, collect
, unhash_lock_stateid
);
6655 nfsd_print_client_locks(struct nfs4_client
*clp
)
6657 u64 count
= nfsd_foreach_client_lock(clp
, 0, NULL
, NULL
);
6658 nfsd_print_count(clp
, count
, "locked files");
6663 nfsd_inject_print_locks(void)
6665 struct nfs4_client
*clp
;
6667 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6670 if (!nfsd_netns_ready(nn
))
6673 spin_lock(&nn
->client_lock
);
6674 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6675 count
+= nfsd_print_client_locks(clp
);
6676 spin_unlock(&nn
->client_lock
);
6682 nfsd_reap_locks(struct list_head
*reaplist
)
6684 struct nfs4_client
*clp
;
6685 struct nfs4_ol_stateid
*stp
, *next
;
6687 list_for_each_entry_safe(stp
, next
, reaplist
, st_locks
) {
6688 list_del_init(&stp
->st_locks
);
6689 clp
= stp
->st_stid
.sc_client
;
6690 nfs4_put_stid(&stp
->st_stid
);
6696 nfsd_inject_forget_client_locks(struct sockaddr_storage
*addr
, size_t addr_size
)
6698 unsigned int count
= 0;
6699 struct nfs4_client
*clp
;
6700 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6702 LIST_HEAD(reaplist
);
6704 if (!nfsd_netns_ready(nn
))
6707 spin_lock(&nn
->client_lock
);
6708 clp
= nfsd_find_client(addr
, addr_size
);
6710 count
= nfsd_collect_client_locks(clp
, &reaplist
, 0);
6711 spin_unlock(&nn
->client_lock
);
6712 nfsd_reap_locks(&reaplist
);
6717 nfsd_inject_forget_locks(u64 max
)
6720 struct nfs4_client
*clp
;
6721 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6723 LIST_HEAD(reaplist
);
6725 if (!nfsd_netns_ready(nn
))
6728 spin_lock(&nn
->client_lock
);
6729 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6730 count
+= nfsd_collect_client_locks(clp
, &reaplist
, max
- count
);
6731 if (max
!= 0 && count
>= max
)
6734 spin_unlock(&nn
->client_lock
);
6735 nfsd_reap_locks(&reaplist
);
6740 nfsd_foreach_client_openowner(struct nfs4_client
*clp
, u64 max
,
6741 struct list_head
*collect
,
6742 void (*func
)(struct nfs4_openowner
*))
6744 struct nfs4_openowner
*oop
, *next
;
6745 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6749 lockdep_assert_held(&nn
->client_lock
);
6751 spin_lock(&clp
->cl_lock
);
6752 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
6756 atomic_inc(&clp
->cl_refcount
);
6757 list_add(&oop
->oo_perclient
, collect
);
6762 * Despite the fact that these functions deal with
6763 * 64-bit integers for "count", we must ensure that
6764 * it doesn't blow up the clp->cl_refcount. Throw a
6765 * warning if we start to approach INT_MAX here.
6767 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6771 spin_unlock(&clp
->cl_lock
);
6777 nfsd_print_client_openowners(struct nfs4_client
*clp
)
6779 u64 count
= nfsd_foreach_client_openowner(clp
, 0, NULL
, NULL
);
6781 nfsd_print_count(clp
, count
, "openowners");
6786 nfsd_collect_client_openowners(struct nfs4_client
*clp
,
6787 struct list_head
*collect
, u64 max
)
6789 return nfsd_foreach_client_openowner(clp
, max
, collect
,
6790 unhash_openowner_locked
);
6794 nfsd_inject_print_openowners(void)
6796 struct nfs4_client
*clp
;
6798 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6801 if (!nfsd_netns_ready(nn
))
6804 spin_lock(&nn
->client_lock
);
6805 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6806 count
+= nfsd_print_client_openowners(clp
);
6807 spin_unlock(&nn
->client_lock
);
6813 nfsd_reap_openowners(struct list_head
*reaplist
)
6815 struct nfs4_client
*clp
;
6816 struct nfs4_openowner
*oop
, *next
;
6818 list_for_each_entry_safe(oop
, next
, reaplist
, oo_perclient
) {
6819 list_del_init(&oop
->oo_perclient
);
6820 clp
= oop
->oo_owner
.so_client
;
6821 release_openowner(oop
);
6827 nfsd_inject_forget_client_openowners(struct sockaddr_storage
*addr
,
6830 unsigned int count
= 0;
6831 struct nfs4_client
*clp
;
6832 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6834 LIST_HEAD(reaplist
);
6836 if (!nfsd_netns_ready(nn
))
6839 spin_lock(&nn
->client_lock
);
6840 clp
= nfsd_find_client(addr
, addr_size
);
6842 count
= nfsd_collect_client_openowners(clp
, &reaplist
, 0);
6843 spin_unlock(&nn
->client_lock
);
6844 nfsd_reap_openowners(&reaplist
);
6849 nfsd_inject_forget_openowners(u64 max
)
6852 struct nfs4_client
*clp
;
6853 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6855 LIST_HEAD(reaplist
);
6857 if (!nfsd_netns_ready(nn
))
6860 spin_lock(&nn
->client_lock
);
6861 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6862 count
+= nfsd_collect_client_openowners(clp
, &reaplist
,
6864 if (max
!= 0 && count
>= max
)
6867 spin_unlock(&nn
->client_lock
);
6868 nfsd_reap_openowners(&reaplist
);
6872 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
6873 struct list_head
*victims
)
6875 struct nfs4_delegation
*dp
, *next
;
6876 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6880 lockdep_assert_held(&nn
->client_lock
);
6882 spin_lock(&state_lock
);
6883 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
6886 * It's not safe to mess with delegations that have a
6887 * non-zero dl_time. They might have already been broken
6888 * and could be processed by the laundromat outside of
6889 * the state_lock. Just leave them be.
6891 if (dp
->dl_time
!= 0)
6894 atomic_inc(&clp
->cl_refcount
);
6895 WARN_ON(!unhash_delegation_locked(dp
));
6896 list_add(&dp
->dl_recall_lru
, victims
);
6900 * Despite the fact that these functions deal with
6901 * 64-bit integers for "count", we must ensure that
6902 * it doesn't blow up the clp->cl_refcount. Throw a
6903 * warning if we start to approach INT_MAX here.
6905 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6909 spin_unlock(&state_lock
);
6914 nfsd_print_client_delegations(struct nfs4_client
*clp
)
6916 u64 count
= nfsd_find_all_delegations(clp
, 0, NULL
);
6918 nfsd_print_count(clp
, count
, "delegations");
6923 nfsd_inject_print_delegations(void)
6925 struct nfs4_client
*clp
;
6927 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6930 if (!nfsd_netns_ready(nn
))
6933 spin_lock(&nn
->client_lock
);
6934 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6935 count
+= nfsd_print_client_delegations(clp
);
6936 spin_unlock(&nn
->client_lock
);
6942 nfsd_forget_delegations(struct list_head
*reaplist
)
6944 struct nfs4_client
*clp
;
6945 struct nfs4_delegation
*dp
, *next
;
6947 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6948 list_del_init(&dp
->dl_recall_lru
);
6949 clp
= dp
->dl_stid
.sc_client
;
6950 revoke_delegation(dp
);
6956 nfsd_inject_forget_client_delegations(struct sockaddr_storage
*addr
,
6960 struct nfs4_client
*clp
;
6961 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6963 LIST_HEAD(reaplist
);
6965 if (!nfsd_netns_ready(nn
))
6968 spin_lock(&nn
->client_lock
);
6969 clp
= nfsd_find_client(addr
, addr_size
);
6971 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6972 spin_unlock(&nn
->client_lock
);
6974 nfsd_forget_delegations(&reaplist
);
6979 nfsd_inject_forget_delegations(u64 max
)
6982 struct nfs4_client
*clp
;
6983 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6985 LIST_HEAD(reaplist
);
6987 if (!nfsd_netns_ready(nn
))
6990 spin_lock(&nn
->client_lock
);
6991 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6992 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6993 if (max
!= 0 && count
>= max
)
6996 spin_unlock(&nn
->client_lock
);
6997 nfsd_forget_delegations(&reaplist
);
7002 nfsd_recall_delegations(struct list_head
*reaplist
)
7004 struct nfs4_client
*clp
;
7005 struct nfs4_delegation
*dp
, *next
;
7007 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
7008 list_del_init(&dp
->dl_recall_lru
);
7009 clp
= dp
->dl_stid
.sc_client
;
7011 * We skipped all entries that had a zero dl_time before,
7012 * so we can now reset the dl_time back to 0. If a delegation
7013 * break comes in now, then it won't make any difference since
7014 * we're recalling it either way.
7016 spin_lock(&state_lock
);
7018 spin_unlock(&state_lock
);
7019 nfsd_break_one_deleg(dp
);
7025 nfsd_inject_recall_client_delegations(struct sockaddr_storage
*addr
,
7029 struct nfs4_client
*clp
;
7030 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
7032 LIST_HEAD(reaplist
);
7034 if (!nfsd_netns_ready(nn
))
7037 spin_lock(&nn
->client_lock
);
7038 clp
= nfsd_find_client(addr
, addr_size
);
7040 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
7041 spin_unlock(&nn
->client_lock
);
7043 nfsd_recall_delegations(&reaplist
);
7048 nfsd_inject_recall_delegations(u64 max
)
7051 struct nfs4_client
*clp
, *next
;
7052 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
7054 LIST_HEAD(reaplist
);
7056 if (!nfsd_netns_ready(nn
))
7059 spin_lock(&nn
->client_lock
);
7060 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
7061 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
7062 if (max
!= 0 && ++count
>= max
)
7065 spin_unlock(&nn
->client_lock
);
7066 nfsd_recall_delegations(&reaplist
);
7069 #endif /* CONFIG_NFSD_FAULT_INJECTION */
7072 * Since the lifetime of a delegation isn't limited to that of an open, a
7073 * client may quite reasonably hang on to a delegation as long as it has
7074 * the inode cached. This becomes an obvious problem the first time a
7075 * client's inode cache approaches the size of the server's total memory.
7077 * For now we avoid this problem by imposing a hard limit on the number
7078 * of delegations, which varies according to the server's memory size.
7081 set_max_delegations(void)
7084 * Allow at most 4 delegations per megabyte of RAM. Quick
7085 * estimates suggest that in the worst case (where every delegation
7086 * is for a different inode), a delegation could take about 1.5K,
7087 * giving a worst case usage of about 6% of memory.
7089 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
7092 static int nfs4_state_create_net(struct net
*net
)
7094 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
7097 nn
->conf_id_hashtbl
= kmalloc_array(CLIENT_HASH_SIZE
,
7098 sizeof(struct list_head
),
7100 if (!nn
->conf_id_hashtbl
)
7102 nn
->unconf_id_hashtbl
= kmalloc_array(CLIENT_HASH_SIZE
,
7103 sizeof(struct list_head
),
7105 if (!nn
->unconf_id_hashtbl
)
7107 nn
->sessionid_hashtbl
= kmalloc_array(SESSION_HASH_SIZE
,
7108 sizeof(struct list_head
),
7110 if (!nn
->sessionid_hashtbl
)
7113 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
7114 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
7115 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
7117 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
7118 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
7119 nn
->conf_name_tree
= RB_ROOT
;
7120 nn
->unconf_name_tree
= RB_ROOT
;
7121 nn
->boot_time
= get_seconds();
7122 nn
->grace_ended
= false;
7123 nn
->nfsd4_manager
.block_opens
= true;
7124 INIT_LIST_HEAD(&nn
->nfsd4_manager
.list
);
7125 INIT_LIST_HEAD(&nn
->client_lru
);
7126 INIT_LIST_HEAD(&nn
->close_lru
);
7127 INIT_LIST_HEAD(&nn
->del_recall_lru
);
7128 spin_lock_init(&nn
->client_lock
);
7130 spin_lock_init(&nn
->blocked_locks_lock
);
7131 INIT_LIST_HEAD(&nn
->blocked_locks_lru
);
7133 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
7139 kfree(nn
->unconf_id_hashtbl
);
7141 kfree(nn
->conf_id_hashtbl
);
7147 nfs4_state_destroy_net(struct net
*net
)
7150 struct nfs4_client
*clp
= NULL
;
7151 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
7153 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
7154 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
7155 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
7156 destroy_client(clp
);
7160 WARN_ON(!list_empty(&nn
->blocked_locks_lru
));
7162 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
7163 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
7164 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
7165 destroy_client(clp
);
7169 kfree(nn
->sessionid_hashtbl
);
7170 kfree(nn
->unconf_id_hashtbl
);
7171 kfree(nn
->conf_id_hashtbl
);
7176 nfs4_state_start_net(struct net
*net
)
7178 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
7181 ret
= nfs4_state_create_net(net
);
7184 locks_start_grace(net
, &nn
->nfsd4_manager
);
7185 nfsd4_client_tracking_init(net
);
7186 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %x)\n",
7187 nn
->nfsd4_grace
, net
->ns
.inum
);
7188 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
7192 /* initialization to perform when the nfsd service is started: */
7195 nfs4_state_start(void)
7199 ret
= set_callback_cred();
7203 laundry_wq
= alloc_workqueue("%s", WQ_UNBOUND
, 0, "nfsd4");
7204 if (laundry_wq
== NULL
) {
7206 goto out_cleanup_cred
;
7208 ret
= nfsd4_create_callback_queue();
7210 goto out_free_laundry
;
7212 set_max_delegations();
7216 destroy_workqueue(laundry_wq
);
7218 cleanup_callback_cred();
7223 nfs4_state_shutdown_net(struct net
*net
)
7225 struct nfs4_delegation
*dp
= NULL
;
7226 struct list_head
*pos
, *next
, reaplist
;
7227 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
7229 cancel_delayed_work_sync(&nn
->laundromat_work
);
7230 locks_end_grace(&nn
->nfsd4_manager
);
7232 INIT_LIST_HEAD(&reaplist
);
7233 spin_lock(&state_lock
);
7234 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
7235 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
7236 WARN_ON(!unhash_delegation_locked(dp
));
7237 list_add(&dp
->dl_recall_lru
, &reaplist
);
7239 spin_unlock(&state_lock
);
7240 list_for_each_safe(pos
, next
, &reaplist
) {
7241 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
7242 list_del_init(&dp
->dl_recall_lru
);
7243 destroy_unhashed_deleg(dp
);
7246 nfsd4_client_tracking_exit(net
);
7247 nfs4_state_destroy_net(net
);
7251 nfs4_state_shutdown(void)
7253 destroy_workqueue(laundry_wq
);
7254 nfsd4_destroy_callback_queue();
7255 cleanup_callback_cred();
7259 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
7261 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
7262 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
7266 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
7268 if (cstate
->minorversion
) {
7269 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
7270 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
7275 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
7277 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
7281 * functions to set current state id
7284 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
,
7285 union nfsd4_op_u
*u
)
7287 put_stateid(cstate
, &u
->open_downgrade
.od_stateid
);
7291 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
,
7292 union nfsd4_op_u
*u
)
7294 put_stateid(cstate
, &u
->open
.op_stateid
);
7298 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
,
7299 union nfsd4_op_u
*u
)
7301 put_stateid(cstate
, &u
->close
.cl_stateid
);
7305 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
,
7306 union nfsd4_op_u
*u
)
7308 put_stateid(cstate
, &u
->lock
.lk_resp_stateid
);
7312 * functions to consume current state id
7316 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
,
7317 union nfsd4_op_u
*u
)
7319 get_stateid(cstate
, &u
->open_downgrade
.od_stateid
);
7323 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
,
7324 union nfsd4_op_u
*u
)
7326 get_stateid(cstate
, &u
->delegreturn
.dr_stateid
);
7330 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
,
7331 union nfsd4_op_u
*u
)
7333 get_stateid(cstate
, &u
->free_stateid
.fr_stateid
);
7337 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
,
7338 union nfsd4_op_u
*u
)
7340 get_stateid(cstate
, &u
->setattr
.sa_stateid
);
7344 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
,
7345 union nfsd4_op_u
*u
)
7347 get_stateid(cstate
, &u
->close
.cl_stateid
);
7351 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
,
7352 union nfsd4_op_u
*u
)
7354 get_stateid(cstate
, &u
->locku
.lu_stateid
);
7358 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
,
7359 union nfsd4_op_u
*u
)
7361 get_stateid(cstate
, &u
->read
.rd_stateid
);
7365 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
,
7366 union nfsd4_op_u
*u
)
7368 get_stateid(cstate
, &u
->write
.wr_stateid
);